diff --git a/src/main/resources/update/1_12.sql b/src/main/resources/update/1_12.sql
new file mode 100644
index 0000000..0030169
--- /dev/null
+++ b/src/main/resources/update/1_12.sql
@@ -0,0 +1 @@
+ALTER TABLE GROUP_MEMBER ADD COLUMN MANAGER BOOLEAN DEFAULT FALSE;
\ No newline at end of file
diff --git a/src/main/scala/ScalatraBootstrap.scala b/src/main/scala/ScalatraBootstrap.scala
index de3c40d..21c213d 100644
--- a/src/main/scala/ScalatraBootstrap.scala
+++ b/src/main/scala/ScalatraBootstrap.scala
@@ -20,7 +20,6 @@
     context.mount(new DashboardController, "/*")
     context.mount(new UserManagementController, "/*")
     context.mount(new SystemSettingsController, "/*")
-    context.mount(new CreateRepositoryController, "/*")
     context.mount(new AccountController, "/*")
     context.mount(new RepositoryViewerController, "/*")
     context.mount(new WikiController, "/*")
diff --git a/src/main/scala/app/AccountController.scala b/src/main/scala/app/AccountController.scala
index df24aad..d35379b 100644
--- a/src/main/scala/app/AccountController.scala
+++ b/src/main/scala/app/AccountController.scala
@@ -1,17 +1,25 @@
 package app
 
 import service._
-import util.{FileUtil, OneselfAuthenticator}
+import util._
 import util.StringUtil._
 import util.Directory._
+import util.ControlUtil._
 import jp.sf.amateras.scalatra.forms._
 import org.apache.commons.io.FileUtils
+import org.scalatra.i18n.Messages
+import org.eclipse.jgit.api.Git
+import org.eclipse.jgit.lib.{FileMode, Constants}
+import org.eclipse.jgit.dircache.DirCache
+import model.GroupMember
 
 class AccountController extends AccountControllerBase
-  with AccountService with RepositoryService with ActivityService with OneselfAuthenticator
+  with AccountService with RepositoryService with ActivityService with WikiService with LabelsService
+  with OneselfAuthenticator with UsersAuthenticator with GroupManagerAuthenticator with ReadableUsersAuthenticator
 
 trait AccountControllerBase extends AccountManagementControllerBase {
-  self: AccountService with RepositoryService with ActivityService with OneselfAuthenticator =>
+  self: AccountService with RepositoryService with ActivityService with WikiService with LabelsService
+    with OneselfAuthenticator with UsersAuthenticator with GroupManagerAuthenticator with ReadableUsersAuthenticator =>
 
   case class AccountNewForm(userName: String, password: String, fullName: String, mailAddress: String,
                             url: Option[String], fileId: Option[String])
@@ -37,6 +45,40 @@
     "clearImage"  -> trim(label("Clear image"  , boolean()))
   )(AccountEditForm.apply)
 
+  case class NewGroupForm(groupName: String, url: Option[String], fileId: Option[String], members: String)
+  case class EditGroupForm(groupName: String, url: Option[String], fileId: Option[String], members: String, clearImage: Boolean)
+
+  val newGroupForm = mapping(
+    "groupName" -> trim(label("Group name" ,text(required, maxlength(100), identifier, uniqueUserName))),
+    "url"       -> trim(label("URL"        ,optional(text(maxlength(200))))),
+    "fileId"    -> trim(label("File ID"    ,optional(text()))),
+    "members"   -> trim(label("Members"    ,text(required, members)))
+  )(NewGroupForm.apply)
+
+  val editGroupForm = mapping(
+    "groupName"  -> trim(label("Group name"  ,text(required, maxlength(100), identifier))),
+    "url"        -> trim(label("URL"         ,optional(text(maxlength(200))))),
+    "fileId"     -> trim(label("File ID"     ,optional(text()))),
+    "members"    -> trim(label("Members"     ,text(required, members))),
+    "clearImage" -> trim(label("Clear image" ,boolean()))
+  )(EditGroupForm.apply)
+
+  case class RepositoryCreationForm(owner: String, name: String, description: Option[String], isPrivate: Boolean, createReadme: Boolean)
+  case class ForkRepositoryForm(owner: String, name: String)
+
+  val newRepositoryForm = mapping(
+    "owner"        -> trim(label("Owner"          , text(required, maxlength(40), identifier, existsAccount))),
+    "name"         -> trim(label("Repository name", text(required, maxlength(40), identifier, uniqueRepository))),
+    "description"  -> trim(label("Description"    , optional(text()))),
+    "isPrivate"    -> trim(label("Repository Type", boolean())),
+    "createReadme" -> trim(label("Create README"  , boolean()))
+  )(RepositoryCreationForm.apply)
+
+  val forkRepositoryForm = mapping(
+    "owner" -> trim(label("Repository owner", text(required))),
+    "name"  -> trim(label("Repository name",  text(required)))
+  )(ForkRepositoryForm.apply)
+
   /**
    * Displays user information.
    */
@@ -51,14 +93,20 @@
             getActivitiesByUser(userName, true))
 
         // Members
-        case "members" if(account.isGroupAccount) =>
-          _root_.account.html.members(account, getGroupMembers(account.userName))
+        case "members" if(account.isGroupAccount) => {
+          val members = getGroupMembers(account.userName)
+          _root_.account.html.members(account, members.map(_.userName),
+            context.loginAccount.exists(x => members.exists { member => member.userName == x.userName && member.isManager }))
+        }
 
         // Repositories
-        case _ =>
+        case _ => {
+          val members = getGroupMembers(account.userName)
           _root_.account.html.repositories(account,
             if(account.isGroupAccount) Nil else getGroupsByUserName(userName),
-            getVisibleRepositories(context.loginAccount, baseUrl, Some(userName)))
+            getVisibleRepositories(context.loginAccount, baseUrl, Some(userName)),
+            context.loginAccount.exists(x => members.exists { member => member.userName == x.userName && member.isManager }))
+        }
       }
     } getOrElse NotFound
   }
@@ -134,4 +182,228 @@
     } else NotFound
   }
 
+  get("/groups/new")(usersOnly {
+    account.html.group(None, List(GroupMember("", context.loginAccount.get.userName, true)))
+  })
+
+  post("/groups/new", newGroupForm)(usersOnly { form =>
+    createGroup(form.groupName, form.url)
+    updateGroupMembers(form.groupName, form.members.split(",").map {
+      _.split(":") match {
+        case Array(userName, isManager) => (userName, isManager.toBoolean)
+      }
+    }.toList)
+    updateImage(form.groupName, form.fileId, false)
+    redirect(s"/${form.groupName}")
+  })
+
+  get("/:groupName/_editgroup")(managersOnly {
+    defining(params("groupName")){ groupName =>
+      account.html.group(getAccountByUserName(groupName, true), getGroupMembers(groupName))
+    }
+  })
+
+  get("/:groupName/_deletegroup")(managersOnly {
+    defining(params("groupName")){ groupName =>
+      // Remove from GROUP_MEMBER
+      updateGroupMembers(groupName, Nil)
+      // Remove repositories
+      getRepositoryNamesOfUser(groupName).foreach { repositoryName =>
+        deleteRepository(groupName, repositoryName)
+        FileUtils.deleteDirectory(getRepositoryDir(groupName, repositoryName))
+        FileUtils.deleteDirectory(getWikiRepositoryDir(groupName, repositoryName))
+        FileUtils.deleteDirectory(getTemporaryDir(groupName, repositoryName))
+      }
+    }
+    redirect("/")
+  })
+
+  post("/:groupName/_editgroup", editGroupForm)(managersOnly { form =>
+    defining(params("groupName"), form.members.split(",").map {
+      _.split(":") match {
+        case Array(userName, isManager) => (userName, isManager.toBoolean)
+      }
+    }.toList){ case (groupName, members) =>
+      getAccountByUserName(groupName, true).map { account =>
+        updateGroup(groupName, form.url, false)
+
+        // Update GROUP_MEMBER
+        updateGroupMembers(form.groupName, members)
+        // Update COLLABORATOR for group repositories
+        getRepositoryNamesOfUser(form.groupName).foreach { repositoryName =>
+          removeCollaborators(form.groupName, repositoryName)
+          members.foreach { case (userName, isManager) =>
+            addCollaborator(form.groupName, repositoryName, userName)
+          }
+        }
+
+        updateImage(form.groupName, form.fileId, form.clearImage)
+        redirect(s"/${form.groupName}")
+
+      } getOrElse NotFound
+    }
+  })
+
+  /**
+   * Show the new repository form.
+   */
+  get("/new")(usersOnly {
+    account.html.newrepo(getGroupsByUserName(context.loginAccount.get.userName))
+  })
+
+  /**
+   * Create new repository.
+   */
+  post("/new", newRepositoryForm)(usersOnly { form =>
+    LockUtil.lock(s"${form.owner}/${form.name}/create"){
+      if(getRepository(form.owner, form.name, baseUrl).isEmpty){
+        val ownerAccount  = getAccountByUserName(form.owner).get
+        val loginAccount  = context.loginAccount.get
+        val loginUserName = loginAccount.userName
+
+        // Insert to the database at first
+        createRepository(form.name, form.owner, form.description, form.isPrivate)
+
+        // Add collaborators for group repository
+        if(ownerAccount.isGroupAccount){
+          getGroupMembers(form.owner).foreach { member =>
+            addCollaborator(form.owner, form.name, member.userName)
+          }
+        }
+
+        // Insert default labels
+        insertDefaultLabels(form.owner, form.name)
+
+        // Create the actual repository
+        val gitdir = getRepositoryDir(form.owner, form.name)
+        JGitUtil.initRepository(gitdir)
+
+        if(form.createReadme){
+          using(Git.open(gitdir)){ git =>
+            val builder  = DirCache.newInCore.builder()
+            val inserter = git.getRepository.newObjectInserter()
+            val headId   = git.getRepository.resolve(Constants.HEAD + "^{commit}")
+            val content  = if(form.description.nonEmpty){
+              form.name + "\n" +
+              "===============\n" +
+              "\n" +
+              form.description.get
+            } else {
+              form.name + "\n" +
+              "===============\n"
+            }
+
+            builder.add(JGitUtil.createDirCacheEntry("README.md", FileMode.REGULAR_FILE,
+              inserter.insert(Constants.OBJ_BLOB, content.getBytes("UTF-8"))))
+            builder.finish()
+
+            JGitUtil.createNewCommit(git, inserter, headId, builder.getDirCache.writeTree(inserter),
+              loginAccount.fullName, loginAccount.mailAddress, "Initial commit")
+          }
+        }
+
+        // Create Wiki repository
+        createWikiRepository(loginAccount, form.owner, form.name)
+
+        // Record activity
+        recordCreateRepositoryActivity(form.owner, form.name, loginUserName)
+      }
+
+      // redirect to the repository
+      redirect(s"/${form.owner}/${form.name}")
+    }
+  })
+
+  get("/:owner/:repository/fork")(readableUsersOnly { repository =>
+    val loginAccount   = context.loginAccount.get
+    val loginUserName  = loginAccount.userName
+
+    LockUtil.lock(s"${loginUserName}/${repository.name}/create"){
+      if(repository.owner == loginUserName){
+        // redirect to the repository
+        redirect(s"/${repository.owner}/${repository.name}")
+      } else {
+        getForkedRepositories(repository.owner, repository.name).find(_._1 == loginUserName).map { case (owner, name) =>
+          // redirect to the repository
+          redirect(s"/${owner}/${name}")
+        } getOrElse {
+          // Insert to the database at first
+          val originUserName = repository.repository.originUserName.getOrElse(repository.owner)
+          val originRepositoryName = repository.repository.originRepositoryName.getOrElse(repository.name)
+
+          createRepository(
+            repositoryName       = repository.name,
+            userName             = loginUserName,
+            description          = repository.repository.description,
+            isPrivate            = repository.repository.isPrivate,
+            originRepositoryName = Some(originRepositoryName),
+            originUserName       = Some(originUserName),
+            parentRepositoryName = Some(repository.name),
+            parentUserName       = Some(repository.owner)
+          )
+
+          // Insert default labels
+          insertDefaultLabels(loginUserName, repository.name)
+
+          // clone repository actually
+          JGitUtil.cloneRepository(
+            getRepositoryDir(repository.owner, repository.name),
+            getRepositoryDir(loginUserName, repository.name))
+
+          // Create Wiki repository
+          JGitUtil.cloneRepository(
+            getWikiRepositoryDir(repository.owner, repository.name),
+            getWikiRepositoryDir(loginUserName, repository.name))
+
+          // insert commit id
+          using(Git.open(getRepositoryDir(loginUserName, repository.name))){ git =>
+            JGitUtil.getRepositoryInfo(loginUserName, repository.name, baseUrl).branchList.foreach { branch =>
+              JGitUtil.getCommitLog(git, branch) match {
+                case Right((commits, _)) => commits.foreach { commit =>
+                  if(!existsCommitId(loginUserName, repository.name, commit.id)){
+                    insertCommitId(loginUserName, repository.name, commit.id)
+                  }
+                }
+                case Left(_) => ???
+              }
+            }
+          }
+
+          // Record activity
+          recordForkActivity(repository.owner, repository.name, loginUserName)
+          // redirect to the repository
+          redirect(s"/${loginUserName}/${repository.name}")
+        }
+      }
+    }
+  })
+
+  private def insertDefaultLabels(userName: String, repositoryName: String): Unit = {
+    createLabel(userName, repositoryName, "bug", "fc2929")
+    createLabel(userName, repositoryName, "duplicate", "cccccc")
+    createLabel(userName, repositoryName, "enhancement", "84b6eb")
+    createLabel(userName, repositoryName, "invalid", "e6e6e6")
+    createLabel(userName, repositoryName, "question", "cc317c")
+    createLabel(userName, repositoryName, "wontfix", "ffffff")
+  }
+
+  private def existsAccount: Constraint = new Constraint(){
+    override def validate(name: String, value: String, messages: Messages): Option[String] =
+      if(getAccountByUserName(value).isEmpty) Some("User or group does not exist.") else None
+  }
+
+  private def uniqueRepository: Constraint = new Constraint(){
+    override def validate(name: String, value: String, params: Map[String, String], messages: Messages): Option[String] =
+      params.get("owner").flatMap { userName =>
+        getRepositoryNamesOfUser(userName).find(_ == value).map(_ => "Repository already exists.")
+      }
+  }
+
+  private def members: Constraint = new Constraint(){
+    override def validate(name: String, value: String, messages: Messages): Option[String] = {
+      if(value.split(",").exists {
+        _.split(":") match { case Array(userName, isManager) => isManager.toBoolean }
+      }) None else Some("Must select one manager at least.")
+    }
+  }
 }
diff --git a/src/main/scala/app/CreateRepositoryController.scala b/src/main/scala/app/CreateRepositoryController.scala
deleted file mode 100644
index 16cd05c..0000000
--- a/src/main/scala/app/CreateRepositoryController.scala
+++ /dev/null
@@ -1,199 +0,0 @@
-package app
-
-import util.Directory._
-import util.ControlUtil._
-import util._
-import service._
-import org.eclipse.jgit.api.Git
-import jp.sf.amateras.scalatra.forms._
-import org.eclipse.jgit.lib.{FileMode, Constants}
-import org.eclipse.jgit.dircache.DirCache
-import org.scalatra.i18n.Messages
-
-class CreateRepositoryController extends CreateRepositoryControllerBase
-  with RepositoryService with AccountService with WikiService with LabelsService with ActivityService
-  with UsersAuthenticator with ReadableUsersAuthenticator
-
-/**
- * Creates new repository.
- */
-trait CreateRepositoryControllerBase extends ControllerBase {
-  self: RepositoryService with AccountService with WikiService with LabelsService with ActivityService
-    with UsersAuthenticator with ReadableUsersAuthenticator =>
-
-  case class RepositoryCreationForm(owner: String, name: String, description: Option[String], isPrivate: Boolean, createReadme: Boolean)
-
-  case class ForkRepositoryForm(owner: String, name: String)
-
-  val newForm = mapping(
-    "owner"        -> trim(label("Owner"          , text(required, maxlength(40), identifier, existsAccount))),
-    "name"         -> trim(label("Repository name", text(required, maxlength(40), identifier, unique))),
-    "description"  -> trim(label("Description"    , optional(text()))),
-    "isPrivate"    -> trim(label("Repository Type", boolean())),
-    "createReadme" -> trim(label("Create README"  , boolean()))
-  )(RepositoryCreationForm.apply)
-
-  val forkForm = mapping(
-    "owner" -> trim(label("Repository owner", text(required))),
-    "name"  -> trim(label("Repository name",  text(required)))
-  )(ForkRepositoryForm.apply)
-
-  /**
-   * Show the new repository form.
-   */
-  get("/new")(usersOnly {
-    html.newrepo(getGroupsByUserName(context.loginAccount.get.userName))
-  })
-  
-  /**
-   * Create new repository.
-   */
-  post("/new", newForm)(usersOnly { form =>
-    LockUtil.lock(s"${form.owner}/${form.name}/create"){
-      if(getRepository(form.owner, form.name, baseUrl).isEmpty){
-        val ownerAccount  = getAccountByUserName(form.owner).get
-        val loginAccount  = context.loginAccount.get
-        val loginUserName = loginAccount.userName
-
-        // Insert to the database at first
-        createRepository(form.name, form.owner, form.description, form.isPrivate)
-
-        // Add collaborators for group repository
-        if(ownerAccount.isGroupAccount){
-          getGroupMembers(form.owner).foreach { userName =>
-            addCollaborator(form.owner, form.name, userName)
-          }
-        }
-
-        // Insert default labels
-        insertDefaultLabels(form.owner, form.name)
-
-        // Create the actual repository
-        val gitdir = getRepositoryDir(form.owner, form.name)
-        JGitUtil.initRepository(gitdir)
-
-        if(form.createReadme){
-          using(Git.open(gitdir)){ git =>
-            val builder  = DirCache.newInCore.builder()
-            val inserter = git.getRepository.newObjectInserter()
-            val headId   = git.getRepository.resolve(Constants.HEAD + "^{commit}")
-            val content  = if(form.description.nonEmpty){
-              form.name + "\n" +
-              "===============\n" +
-              "\n" +
-              form.description.get
-            } else {
-              form.name + "\n" +
-              "===============\n"
-            }
-
-            builder.add(JGitUtil.createDirCacheEntry("README.md", FileMode.REGULAR_FILE,
-              inserter.insert(Constants.OBJ_BLOB, content.getBytes("UTF-8"))))
-            builder.finish()
-
-            JGitUtil.createNewCommit(git, inserter, headId, builder.getDirCache.writeTree(inserter),
-              loginAccount.fullName, loginAccount.mailAddress, "Initial commit")
-          }
-        }
-
-        // Create Wiki repository
-        createWikiRepository(loginAccount, form.owner, form.name)
-
-        // Record activity
-        recordCreateRepositoryActivity(form.owner, form.name, loginUserName)
-      }
-
-      // redirect to the repository
-      redirect(s"/${form.owner}/${form.name}")
-    }
-  })
-
-  get("/:owner/:repository/fork")(readableUsersOnly { repository =>
-    val loginAccount   = context.loginAccount.get
-    val loginUserName  = loginAccount.userName
-
-    LockUtil.lock(s"${loginUserName}/${repository.name}/create"){
-      if(repository.owner == loginUserName){
-        // redirect to the repository
-        redirect(s"/${repository.owner}/${repository.name}")
-      } else {
-        getForkedRepositories(repository.owner, repository.name).find(_._1 == loginUserName).map { case (owner, name) =>
-          // redirect to the repository
-          redirect(s"/${owner}/${name}")
-        } getOrElse {
-          // Insert to the database at first
-          val originUserName = repository.repository.originUserName.getOrElse(repository.owner)
-          val originRepositoryName = repository.repository.originRepositoryName.getOrElse(repository.name)
-
-          createRepository(
-            repositoryName       = repository.name,
-            userName             = loginUserName,
-            description          = repository.repository.description,
-            isPrivate            = repository.repository.isPrivate,
-            originRepositoryName = Some(originRepositoryName),
-            originUserName       = Some(originUserName),
-            parentRepositoryName = Some(repository.name),
-            parentUserName       = Some(repository.owner)
-          )
-
-          // Insert default labels
-          insertDefaultLabels(loginUserName, repository.name)
-
-          // clone repository actually
-          JGitUtil.cloneRepository(
-            getRepositoryDir(repository.owner, repository.name),
-            getRepositoryDir(loginUserName, repository.name))
-
-          // Create Wiki repository
-          JGitUtil.cloneRepository(
-            getWikiRepositoryDir(repository.owner, repository.name),
-            getWikiRepositoryDir(loginUserName, repository.name))
-
-          // insert commit id
-          using(Git.open(getRepositoryDir(loginUserName, repository.name))){ git =>
-            JGitUtil.getRepositoryInfo(loginUserName, repository.name, baseUrl).branchList.foreach { branch =>
-              JGitUtil.getCommitLog(git, branch) match {
-                case Right((commits, _)) => commits.foreach { commit =>
-                  if(!existsCommitId(loginUserName, repository.name, commit.id)){
-                    insertCommitId(loginUserName, repository.name, commit.id)
-                  }
-                }
-                case Left(_) => ???
-              }
-            }
-          }
-
-          // Record activity
-          recordForkActivity(repository.owner, repository.name, loginUserName)
-          // redirect to the repository
-          redirect(s"/${loginUserName}/${repository.name}")
-        }
-      }
-    }
-  })
-
-  private def insertDefaultLabels(userName: String, repositoryName: String): Unit = {
-    createLabel(userName, repositoryName, "bug", "fc2929")
-    createLabel(userName, repositoryName, "duplicate", "cccccc")
-    createLabel(userName, repositoryName, "enhancement", "84b6eb")
-    createLabel(userName, repositoryName, "invalid", "e6e6e6")
-    createLabel(userName, repositoryName, "question", "cc317c")
-    createLabel(userName, repositoryName, "wontfix", "ffffff")
-  }
-
-  private def existsAccount: Constraint = new Constraint(){
-    override def validate(name: String, value: String, messages: Messages): Option[String] =
-      if(getAccountByUserName(value).isEmpty) Some("User or group does not exist.") else None
-  }
-
-  /**
-   * Duplicate check for the repository name.
-   */
-  private def unique: Constraint = new Constraint(){
-    override def validate(name: String, value: String, params: Map[String, String], messages: Messages): Option[String] =
-      params.get("owner").flatMap { userName =>
-        getRepositoryNamesOfUser(userName).find(_ == value).map(_ => "Repository already exists.")
-      }
-  }
-  
-}
diff --git a/src/main/scala/app/PullRequestsController.scala b/src/main/scala/app/PullRequestsController.scala
index be47ee9..47c0614 100644
--- a/src/main/scala/app/PullRequestsController.scala
+++ b/src/main/scala/app/PullRequestsController.scala
@@ -105,9 +105,9 @@
     } getOrElse NotFound
   })
 
-  get("/:owner/:repository/pull/:id/delete/:branchName")(collaboratorsOnly { repository =>
+  get("/:owner/:repository/pull/:id/delete/*")(collaboratorsOnly { repository =>
     params("id").toIntOpt.map { issueId =>
-      val branchName = params("branchName")
+      val branchName = multiParams("splat").head
       val userName   = context.loginAccount.get.userName
       if(repository.repository.defaultBranch != branchName){
         using(Git.open(getRepositoryDir(repository.owner, repository.name))){ git =>
diff --git a/src/main/scala/app/RepositoryViewerController.scala b/src/main/scala/app/RepositoryViewerController.scala
index 6eb9296..d68dc53 100644
--- a/src/main/scala/app/RepositoryViewerController.scala
+++ b/src/main/scala/app/RepositoryViewerController.scala
@@ -95,7 +95,7 @@
       } map { objectId =>
         if(raw){
           // Download
-          defining(JGitUtil.getContent(git, objectId, false).get){ bytes =>
+          defining(JGitUtil.getContentFromId(git, objectId, false).get){ bytes =>
             contentType = FileUtil.getContentType(path, bytes)
             bytes
           }
@@ -103,7 +103,7 @@
           // Viewer
           val large  = FileUtil.isLarge(git.getRepository.getObjectDatabase.open(objectId).getSize)
           val viewer = if(FileUtil.isImage(path)) "image" else if(large) "large" else "other"
-          val bytes  = if(viewer == "other") JGitUtil.getContent(git, objectId, false) else None
+          val bytes  = if(viewer == "other") JGitUtil.getContentFromId(git, objectId, false) else None
 
           val content = if(viewer == "other"){
             if(bytes.isDefined && FileUtil.isText(bytes.get)){
@@ -159,8 +159,8 @@
   /**
    * Deletes branch.
    */
-  get("/:owner/:repository/delete/:branchName")(collaboratorsOnly { repository =>
-    val branchName = params("branchName")
+  get("/:owner/:repository/delete/*")(collaboratorsOnly { repository =>
+    val branchName = multiParams("splat").head
     val userName   = context.loginAccount.get.userName
     if(repository.repository.defaultBranch != branchName){
       using(Git.open(getRepositoryDir(repository.owner, repository.name))){ git =>
@@ -208,7 +208,7 @@
             while(walk.next){
               val name = walk.getPathString
               val mode = walk.getFileMode(0)
-              if(mode != FileMode.TREE){
+              if(mode == FileMode.REGULAR_FILE){
                 walk.getObjectId(objectId, 0)
                 val entry = new ZipEntry(name)
                 val loader = reader.open(objectId)
@@ -277,7 +277,8 @@
             val readme = files.find { file =>
               readmeFiles.contains(file.name.toLowerCase)
             }.map { file =>
-              file -> StringUtil.convertFromByteArray(JGitUtil.getContent(Git.open(getRepositoryDir(repository.owner, repository.name)), file.id, true).get)
+              file -> StringUtil.convertFromByteArray(JGitUtil.getContentFromId(
+                Git.open(getRepositoryDir(repository.owner, repository.name)), file.id, true).get)
             }
 
             repo.html.files(revision, repository,
diff --git a/src/main/scala/app/UserManagementController.scala b/src/main/scala/app/UserManagementController.scala
index 50ffb3c..dc3543c 100644
--- a/src/main/scala/app/UserManagementController.scala
+++ b/src/main/scala/app/UserManagementController.scala
@@ -5,6 +5,7 @@
 import util.StringUtil._
 import util.ControlUtil._
 import jp.sf.amateras.scalatra.forms._
+import org.scalatra.i18n.Messages
 import org.apache.commons.io.FileUtils
 import util.Directory._
 
@@ -23,10 +24,10 @@
                           fileId: Option[String], clearImage: Boolean, isRemoved: Boolean)
 
   case class NewGroupForm(groupName: String, url: Option[String], fileId: Option[String],
-                          memberNames: Option[String])
+                          members: String)
 
   case class EditGroupForm(groupName: String, url: Option[String], fileId: Option[String],
-                           memberNames: Option[String], clearImage: Boolean, isRemoved: Boolean)
+                           members: String, clearImage: Boolean, isRemoved: Boolean)
 
   val newUserForm = mapping(
     "userName"    -> trim(label("Username"     ,text(required, maxlength(100), identifier, uniqueUserName))),
@@ -51,28 +52,28 @@
   )(EditUserForm.apply)
 
   val newGroupForm = mapping(
-    "groupName"   -> trim(label("Group name"   ,text(required, maxlength(100), identifier, uniqueUserName))),
-    "url"         -> trim(label("URL"          ,optional(text(maxlength(200))))),
-    "fileId"      -> trim(label("File ID"      ,optional(text()))),
-    "memberNames" -> trim(label("Member Names" ,optional(text())))
+    "groupName" -> trim(label("Group name" ,text(required, maxlength(100), identifier, uniqueUserName))),
+    "url"       -> trim(label("URL"        ,optional(text(maxlength(200))))),
+    "fileId"    -> trim(label("File ID"    ,optional(text()))),
+    "members"   -> trim(label("Members"    ,text(required, members)))
   )(NewGroupForm.apply)
 
   val editGroupForm = mapping(
-    "groupName"   -> trim(label("Group name"   ,text(required, maxlength(100), identifier))),
-    "url"         -> trim(label("URL"          ,optional(text(maxlength(200))))),
-    "fileId"      -> trim(label("File ID"      ,optional(text()))),
-    "memberNames" -> trim(label("Member Names" ,optional(text()))),
-    "clearImage"  -> trim(label("Clear image"  ,boolean())),
-    "removed"     -> trim(label("Disable"      ,boolean()))
+    "groupName"  -> trim(label("Group name"  ,text(required, maxlength(100), identifier))),
+    "url"        -> trim(label("URL"         ,optional(text(maxlength(200))))),
+    "fileId"     -> trim(label("File ID"     ,optional(text()))),
+    "members"    -> trim(label("Members"     ,text(required, members))),
+    "clearImage" -> trim(label("Clear image" ,boolean())),
+    "removed"    -> trim(label("Disable"     ,boolean()))
   )(EditGroupForm.apply)
 
   get("/admin/users")(adminOnly {
     val includeRemoved = params.get("includeRemoved").map(_.toBoolean).getOrElse(false)
-    val users = getAllUsers(includeRemoved)
-
-    val members = users.collect { case account if(account.isGroupAccount) =>
-      account.userName -> getGroupMembers(account.userName)
+    val users          = getAllUsers(includeRemoved)
+    val members        = users.collect { case account if(account.isGroupAccount) =>
+      account.userName -> getGroupMembers(account.userName).map(_.userName)
     }.toMap
+
     admin.users.html.list(users, members, includeRemoved)
   })
   
@@ -127,7 +128,11 @@
 
   post("/admin/users/_newgroup", newGroupForm)(adminOnly { form =>
     createGroup(form.groupName, form.url)
-    updateGroupMembers(form.groupName, form.memberNames.map(_.split(",").toList).getOrElse(Nil))
+    updateGroupMembers(form.groupName, form.members.split(",").map {
+      _.split(":") match {
+        case Array(userName, isManager) => (userName, isManager.toBoolean)
+      }
+    }.toList)
     updateImage(form.groupName, form.fileId, false)
     redirect("/admin/users")
   })
@@ -139,7 +144,11 @@
   })
 
   post("/admin/users/:groupName/_editgroup", editGroupForm)(adminOnly { form =>
-    defining(params("groupName"), form.memberNames.map(_.split(",").toList).getOrElse(Nil)){ case (groupName, memberNames) =>
+    defining(params("groupName"), form.members.split(",").map {
+      _.split(":") match {
+        case Array(userName, isManager) => (userName, isManager.toBoolean)
+      }
+    }.toList){ case (groupName, members) =>
       getAccountByUserName(groupName, true).map { account =>
         updateGroup(groupName, form.url, form.isRemoved)
 
@@ -155,11 +164,11 @@
           }
         } else {
           // Update GROUP_MEMBER
-          updateGroupMembers(form.groupName, memberNames)
+          updateGroupMembers(form.groupName, members)
           // Update COLLABORATOR for group repositories
           getRepositoryNamesOfUser(form.groupName).foreach { repositoryName =>
             removeCollaborators(form.groupName, repositoryName)
-            memberNames.foreach { userName =>
+            members.foreach { case (userName, isManager) =>
               addCollaborator(form.groupName, repositoryName, userName)
             }
           }
@@ -172,8 +181,17 @@
     }
   })
 
-  post("/admin/users/_usercheck")(adminOnly {
+  // TODO Move to other generic controller?
+  post("/admin/users/_usercheck"){
     getAccountByUserName(params("userName")).isDefined
-  })
+  }
+
+  private def members: Constraint = new Constraint(){
+    override def validate(name: String, value: String, messages: Messages): Option[String] = {
+      if(value.split(",").exists {
+        _.split(":") match { case Array(userName, isManager) => isManager.toBoolean }
+      }) None else Some("Must select one manager at least.")
+    }
+  }
 
 }
diff --git a/src/main/scala/model/GroupMembers.scala b/src/main/scala/model/GroupMembers.scala
index 0bcd0af..a2a38f3 100644
--- a/src/main/scala/model/GroupMembers.scala
+++ b/src/main/scala/model/GroupMembers.scala
@@ -5,10 +5,12 @@
 object GroupMembers extends Table[GroupMember]("GROUP_MEMBER") {
   def groupName = column[String]("GROUP_NAME", O PrimaryKey)
   def userName = column[String]("USER_NAME", O PrimaryKey)
-  def * = groupName ~ userName <> (GroupMember, GroupMember.unapply _)
+  def isManager = column[Boolean]("MANAGER")
+  def * = groupName ~ userName ~ isManager <> (GroupMember, GroupMember.unapply _)
 }
 
 case class GroupMember(
   groupName: String,
-  userName: String
+  userName: String,
+  isManager: Boolean
 )
\ No newline at end of file
diff --git a/src/main/scala/service/AccountService.scala b/src/main/scala/service/AccountService.scala
index d00c4cd..1b021ea 100644
--- a/src/main/scala/service/AccountService.scala
+++ b/src/main/scala/service/AccountService.scala
@@ -128,18 +128,17 @@
   def updateGroup(groupName: String, url: Option[String], removed: Boolean): Unit =
     Accounts.filter(_.userName is groupName.bind).map(t => t.url.? ~ t.removed).update(url, removed)
 
-  def updateGroupMembers(groupName: String, members: List[String]): Unit = {
+  def updateGroupMembers(groupName: String, members: List[(String, Boolean)]): Unit = {
     Query(GroupMembers).filter(_.groupName is groupName.bind).delete
-    members.foreach { userName =>
-      GroupMembers insert GroupMember (groupName, userName)
+    members.foreach { case (userName, isManager) =>
+      GroupMembers insert GroupMember (groupName, userName, isManager)
     }
   }
 
-  def getGroupMembers(groupName: String): List[String] =
+  def getGroupMembers(groupName: String): List[GroupMember] =
     Query(GroupMembers)
       .filter(_.groupName is groupName.bind)
       .sortBy(_.userName)
-      .map(_.userName)
       .list
 
   def getGroupsByUserName(userName: String): List[String] =
diff --git a/src/main/scala/service/RepositorySearchService.scala b/src/main/scala/service/RepositorySearchService.scala
index ac4f177..57265c8 100644
--- a/src/main/scala/service/RepositorySearchService.scala
+++ b/src/main/scala/service/RepositorySearchService.scala
@@ -63,8 +63,8 @@
     val list = new ListBuffer[(String, String)]
 
     while (treeWalk.next()) {
-      if(treeWalk.getFileMode(0) != FileMode.TREE){
-        JGitUtil.getContent(git, treeWalk.getObjectId(0), false).foreach { bytes =>
+      if(treeWalk.getFileMode(0) == FileMode.REGULAR_FILE){
+        JGitUtil.getContentFromId(git, treeWalk.getObjectId(0), false).foreach { bytes =>
           if(FileUtil.isText(bytes)){
             val text      = StringUtil.convertFromByteArray(bytes)
             val lowerText = text.toLowerCase
diff --git a/src/main/scala/service/RepositoryService.scala b/src/main/scala/service/RepositoryService.scala
index 74bd139..9038ea5 100644
--- a/src/main/scala/service/RepositoryService.scala
+++ b/src/main/scala/service/RepositoryService.scala
@@ -147,7 +147,8 @@
         getForkedCount(
           repository.originUserName.getOrElse(repository.userName),
           repository.originRepositoryName.getOrElse(repository.repositoryName)
-        ))
+        ),
+        getRepositoryManagers(repository.userName))
     }
   }
 
@@ -162,7 +163,8 @@
         getForkedCount(
           repository.originUserName.getOrElse(repository.userName),
           repository.originRepositoryName.getOrElse(repository.repositoryName)
-        ))
+        ),
+        getRepositoryManagers(repository.userName))
     }
   }
 
@@ -195,10 +197,18 @@
         getForkedCount(
           repository.originUserName.getOrElse(repository.userName),
           repository.originRepositoryName.getOrElse(repository.repositoryName)
-        ))
+        ),
+        getRepositoryManagers(repository.userName))
     }
   }
 
+  private def getRepositoryManagers(userName: String): Seq[String] =
+    if(getAccountByUserName(userName).exists(_.isGroupAccount)){
+      getGroupMembers(userName).collect { case x if(x.isManager) => x.userName }
+    } else {
+      Seq(userName)
+    }
+
   /**
    * Updates the last activity date of the repository.
    */
@@ -280,19 +290,19 @@
 
   case class RepositoryInfo(owner: String, name: String, url: String, repository: Repository,
     issueCount: Int, pullCount: Int, commitCount: Int, forkedCount: Int,
-    branchList: List[String], tags: List[util.JGitUtil.TagInfo]){
+    branchList: Seq[String], tags: Seq[util.JGitUtil.TagInfo], managers: Seq[String]){
 
     /**
      * Creates instance with issue count and pull request count.
      */
-    def this(repo: JGitUtil.RepositoryInfo, model: Repository, issueCount: Int, pullCount: Int, forkedCount: Int) =
-      this(repo.owner, repo.name, repo.url, model, issueCount, pullCount, repo.commitCount, forkedCount, repo.branchList, repo.tags)
+    def this(repo: JGitUtil.RepositoryInfo, model: Repository, issueCount: Int, pullCount: Int, forkedCount: Int, managers: Seq[String]) =
+      this(repo.owner, repo.name, repo.url, model, issueCount, pullCount, repo.commitCount, forkedCount, repo.branchList, repo.tags, managers)
 
     /**
      * Creates instance without issue count and pull request count.
      */
-    def this(repo: JGitUtil.RepositoryInfo, model: Repository, forkedCount: Int) =
-      this(repo.owner, repo.name, repo.url, model, 0, 0, repo.commitCount, forkedCount, repo.branchList, repo.tags)
+    def this(repo: JGitUtil.RepositoryInfo, model: Repository, forkedCount: Int, managers: Seq[String]) =
+      this(repo.owner, repo.name, repo.url, model, 0, 0, repo.commitCount, forkedCount, repo.branchList, repo.tags, managers)
   }
 
   case class RepositoryTreeNode(owner: String, name: String, children: List[RepositoryTreeNode])
diff --git a/src/main/scala/service/WikiService.scala b/src/main/scala/service/WikiService.scala
index 00fbabd..f4e3ac5 100644
--- a/src/main/scala/service/WikiService.scala
+++ b/src/main/scala/service/WikiService.scala
@@ -234,7 +234,7 @@
                   builder.add(JGitUtil.createDirCacheEntry(path, tree.getEntryFileMode, tree.getEntryObjectId))
                 } else {
                   created = false
-                  updated = JGitUtil.getContent(git, tree.getEntryObjectId, true).map(new String(_, "UTF-8") != content).getOrElse(false)
+                  updated = JGitUtil.getContentFromId(git, tree.getEntryObjectId, true).map(new String(_, "UTF-8") != content).getOrElse(false)
                 }
               }
             }
@@ -268,35 +268,35 @@
    */
   def deleteWikiPage(owner: String, repository: String, pageName: String,
                      committer: String, mailAddress: String, message: String): Unit = {
-      LockUtil.lock(s"${owner}/${repository}/wiki"){
-        using(Git.open(Directory.getWikiRepositoryDir(owner, repository))){ git =>
-          val builder  = DirCache.newInCore.builder()
-          val inserter = git.getRepository.newObjectInserter()
-          val headId   = git.getRepository.resolve(Constants.HEAD + "^{commit}")
-          var removed  = false
+    LockUtil.lock(s"${owner}/${repository}/wiki"){
+      using(Git.open(Directory.getWikiRepositoryDir(owner, repository))){ git =>
+        val builder  = DirCache.newInCore.builder()
+        val inserter = git.getRepository.newObjectInserter()
+        val headId   = git.getRepository.resolve(Constants.HEAD + "^{commit}")
+        var removed  = false
 
-          using(new RevWalk(git.getRepository)){ revWalk =>
-            using(new TreeWalk(git.getRepository)){ treeWalk =>
-              val index = treeWalk.addTree(revWalk.parseTree(headId))
-              treeWalk.setRecursive(true)
-              while(treeWalk.next){
-                val path = treeWalk.getPathString
-                val tree = treeWalk.getTree(index, classOf[CanonicalTreeParser])
-                if(path != pageName + ".md"){
-                  builder.add(JGitUtil.createDirCacheEntry(path, tree.getEntryFileMode, tree.getEntryObjectId))
-                } else {
-                  removed = true
-                }
+        using(new RevWalk(git.getRepository)){ revWalk =>
+          using(new TreeWalk(git.getRepository)){ treeWalk =>
+            val index = treeWalk.addTree(revWalk.parseTree(headId))
+            treeWalk.setRecursive(true)
+            while(treeWalk.next){
+              val path = treeWalk.getPathString
+              val tree = treeWalk.getTree(index, classOf[CanonicalTreeParser])
+              if(path != pageName + ".md"){
+                builder.add(JGitUtil.createDirCacheEntry(path, tree.getEntryFileMode, tree.getEntryObjectId))
+              } else {
+                removed = true
               }
             }
+          }
 
-            if(removed){
-              builder.finish()
-              JGitUtil.createNewCommit(git, inserter, headId, builder.getDirCache.writeTree(inserter), committer, mailAddress, message)
-            }
+          if(removed){
+            builder.finish()
+            JGitUtil.createNewCommit(git, inserter, headId, builder.getDirCache.writeTree(inserter), committer, mailAddress, message)
           }
         }
       }
+    }
   }
 
 }
diff --git a/src/main/scala/servlet/AutoUpdateListener.scala b/src/main/scala/servlet/AutoUpdateListener.scala
index bfa6992..830ca29 100644
--- a/src/main/scala/servlet/AutoUpdateListener.scala
+++ b/src/main/scala/servlet/AutoUpdateListener.scala
@@ -50,6 +50,7 @@
    * The history of versions. A head of this sequence is the current BitBucket version.
    */
   val versions = Seq(
+    Version(1, 12),
     Version(1, 11),
     Version(1, 10),
     Version(1, 9),
diff --git a/src/main/scala/servlet/GitRepositoryServlet.scala b/src/main/scala/servlet/GitRepositoryServlet.scala
index 9efefd3..00cd04f 100644
--- a/src/main/scala/servlet/GitRepositoryServlet.scala
+++ b/src/main/scala/servlet/GitRepositoryServlet.scala
@@ -8,7 +8,7 @@
 
 import javax.servlet.ServletConfig
 import javax.servlet.ServletContext
-import javax.servlet.http.HttpServletRequest
+import javax.servlet.http.{HttpServletResponse, HttpServletRequest}
 import util.{StringUtil, Keys, JGitUtil, Directory}
 import util.ControlUtil._
 import util.Implicits._
@@ -23,7 +23,7 @@
  * This servlet provides only Git repository functionality.
  * Authentication is provided by [[servlet.BasicAuthenticationFilter]].
  */
-class GitRepositoryServlet extends GitServlet {
+class GitRepositoryServlet extends GitServlet with SystemSettingsService {
 
   private val logger = LoggerFactory.getLogger(classOf[GitRepositoryServlet])
   
@@ -47,7 +47,19 @@
 
     super.init(config)
   }
-  
+
+  override def service(req: HttpServletRequest, res: HttpServletResponse): Unit = {
+    val agent = req.getHeader("USER-AGENT")
+    if(agent == null || !agent.startsWith("git/")){
+      // redirect for browsers
+      val paths   = req.getRequestURI.split("/")
+      val baseUrl = loadSystemSettings().baseUrl.getOrElse(req.getServletContext.getContextPath)
+      res.sendRedirect(baseUrl + "/" + paths.dropRight(1).last + "/" + paths.last.replaceFirst("\\.git$", ""))
+    } else {
+      // response for git client
+      super.service(req, res)
+    }
+  }
 }
 
 class GitBucketReceivePackFactory extends ReceivePackFactory[HttpServletRequest] with SystemSettingsService {
diff --git a/src/main/scala/util/Authenticator.scala b/src/main/scala/util/Authenticator.scala
index c524713..f40af7b 100644
--- a/src/main/scala/util/Authenticator.scala
+++ b/src/main/scala/util/Authenticator.scala
@@ -29,7 +29,7 @@
 /**
  * Allows only the repository owner and administrators.
  */
-trait OwnerAuthenticator { self: ControllerBase with RepositoryService =>
+trait OwnerAuthenticator { self: ControllerBase with RepositoryService with AccountService =>
   protected def ownerOnly(action: (RepositoryInfo) => Any) = { authenticate(action) }
   protected def ownerOnly[T](action: (T, RepositoryInfo) => Any) = (form: T) => { authenticate(action(form, _)) }
 
@@ -40,6 +40,9 @@
           context.loginAccount match {
             case Some(x) if(x.isAdmin) => action(repository)
             case Some(x) if(repository.owner == x.userName) => action(repository)
+            case Some(x) if(getGroupMembers(repository.owner).exists { member =>
+              member.userName == x.userName && member.isManager == true
+            }) => action(repository)
             case _ => Unauthorized()
           }
         } getOrElse NotFound()
@@ -106,7 +109,7 @@
 }
 
 /**
- * Allows only the repository owner and administrators.
+ * Allows only the repository owner (or manager for group repository) and administrators.
  */
 trait ReferrerAuthenticator { self: ControllerBase with RepositoryService =>
   protected def referrersOnly(action: (RepositoryInfo) => Any) = { authenticate(action) }
@@ -155,3 +158,24 @@
     }
   }
 }
+
+/**
+ * Allows only the group managers.
+ */
+trait GroupManagerAuthenticator { self: ControllerBase with AccountService =>
+  protected def managersOnly(action: => Any) = { authenticate(action) }
+  protected def managersOnly[T](action: T => Any) = (form: T) => { authenticate(action(form)) }
+
+  private def authenticate(action: => Any) = {
+    {
+      defining(request.paths){ paths =>
+        context.loginAccount match {
+          case Some(x) if(getGroupMembers(paths(0)).exists { member =>
+            member.userName == x.userName && member.isManager
+          }) => action
+          case _ => Unauthorized()
+        }
+      }
+    }
+  }
+}
diff --git a/src/main/scala/util/JGitUtil.scala b/src/main/scala/util/JGitUtil.scala
index 57fd421..0e2cb40 100644
--- a/src/main/scala/util/JGitUtil.scala
+++ b/src/main/scala/util/JGitUtil.scala
@@ -11,17 +11,20 @@
 import org.eclipse.jgit.treewalk._
 import org.eclipse.jgit.treewalk.filter._
 import org.eclipse.jgit.diff.DiffEntry.ChangeType
-import org.eclipse.jgit.errors.MissingObjectException
+import org.eclipse.jgit.errors.{ConfigInvalidException, MissingObjectException}
 import java.util.Date
 import org.eclipse.jgit.api.errors.NoHeadException
 import service.RepositoryService
 import org.eclipse.jgit.dircache.DirCacheEntry
+import org.slf4j.LoggerFactory
 
 /**
  * Provides complex JGit operations.
  */
 object JGitUtil {
 
+  private val logger = LoggerFactory.getLogger(JGitUtil.getClass)
+
   /**
    * The repository data.
    *
@@ -45,9 +48,10 @@
    * @param commitId the last commit id
    * @param committer the last committer name
    * @param mailAddress the committer's mail address
+   * @param linkUrl the url of submodule
    */
   case class FileInfo(id: ObjectId, isDirectory: Boolean, name: String, time: Date, message: String, commitId: String,
-                      committer: String, mailAddress: String)
+                      committer: String, mailAddress: String, linkUrl: Option[String])
 
   /**
    * The commit data.
@@ -105,6 +109,15 @@
   case class TagInfo(name: String, time: Date, id: String)
 
   /**
+   * The submodule data
+   *
+   * @param name the module name
+   * @param path the path in the repository
+   * @param url the repository url of this module
+   */
+  case class SubmoduleInfo(name: String, path: String, url: String)
+
+  /**
    * Returns RevCommit from the commit or tag id.
    * 
    * @param git the Git object
@@ -162,7 +175,7 @@
    * @return HTML of the file list
    */
   def getFileList(git: Git, revision: String, path: String = "."): List[FileInfo] = {
-    val list = new scala.collection.mutable.ListBuffer[(ObjectId, FileMode, String, String)]
+    val list = new scala.collection.mutable.ListBuffer[(ObjectId, FileMode, String, String, Option[String])]
 
     using(new RevWalk(git.getRepository)){ revWalk =>
       val objectId  = git.getRepository.resolve(revision)
@@ -195,22 +208,28 @@
           })
         }
         while (treeWalk.next()) {
-          list.append((treeWalk.getObjectId(0), treeWalk.getFileMode(0), treeWalk.getPathString, treeWalk.getNameString))
+          // submodule
+          val linkUrl = if(treeWalk.getFileMode(0) == FileMode.GITLINK){
+            getSubmodules(git, revCommit.getTree).find(_.path == treeWalk.getPathString).map(_.url)
+          } else None
+
+          list.append((treeWalk.getObjectId(0), treeWalk.getFileMode(0), treeWalk.getPathString, treeWalk.getNameString, linkUrl))
         }
       }
     }
 
     val commits = getLatestCommitFromPaths(git, list.toList.map(_._3), revision)
-    list.map { case (objectId, fileMode, path, name) =>
+    list.map { case (objectId, fileMode, path, name, linkUrl) =>
       FileInfo(
         objectId,
-        fileMode == FileMode.TREE,
+        fileMode == FileMode.TREE || fileMode == FileMode.GITLINK,
         name,
         commits(path).getCommitterIdent.getWhen,
         commits(path).getShortMessage,
         commits(path).getName,
         commits(path).getCommitterIdent.getName,
-        commits(path).getCommitterIdent.getEmailAddress)
+        commits(path).getCommitterIdent.getEmailAddress,
+        linkUrl)
     }.sortWith { (file1, file2) =>
       (file1.isDirectory, file2.isDirectory) match {
         case (true , false) => true
@@ -326,27 +345,6 @@
   }
 
   /**
-   * Get object content of the given id as String from the Git repository.
-   * 
-   * @param git the Git object
-   * @param id the object id
-   * @param large if false then returns None for the large file
-   * @return the object or None if object does not exist
-   */
-  def getContent(git: Git, id: ObjectId, large: Boolean): Option[Array[Byte]] = try {
-    val loader = git.getRepository.getObjectDatabase.open(id)
-    if(large == false && FileUtil.isLarge(loader.getSize)){
-      None
-    } else {
-      using(git.getRepository.getObjectDatabase){ db =>
-        Some(db.open(id).getBytes)
-      }
-    }
-  } catch {
-    case e: MissingObjectException => None
-  }
-
-  /**
    * Returns the tuple of diff of the given commit and the previous commit id.
    */
   def getDiffs(git: Git, id: String, fetchContent: Boolean = true): (List[DiffInfo], Option[String]) = {
@@ -377,7 +375,7 @@
               DiffInfo(ChangeType.ADD, null, treeWalk.getPathString, None, None)
             } else {
               DiffInfo(ChangeType.ADD, null, treeWalk.getPathString, None,
-                JGitUtil.getContent(git, treeWalk.getObjectId(0), false).filter(FileUtil.isText).map(convertFromByteArray))
+                JGitUtil.getContentFromId(git, treeWalk.getObjectId(0), false).filter(FileUtil.isText).map(convertFromByteArray))
             }))
           }
           (buffer.toList, None)
@@ -400,8 +398,8 @@
         DiffInfo(diff.getChangeType, diff.getOldPath, diff.getNewPath, None, None)
       } else {
         DiffInfo(diff.getChangeType, diff.getOldPath, diff.getNewPath,
-          JGitUtil.getContent(git, diff.getOldId.toObjectId, false).filter(FileUtil.isText).map(convertFromByteArray),
-          JGitUtil.getContent(git, diff.getNewId.toObjectId, false).filter(FileUtil.isText).map(convertFromByteArray))
+          JGitUtil.getContentFromId(git, diff.getOldId.toObjectId, false).filter(FileUtil.isText).map(convertFromByteArray),
+          JGitUtil.getContentFromId(git, diff.getNewId.toObjectId, false).filter(FileUtil.isText).map(convertFromByteArray))
       }
     }.toList
   }
@@ -494,4 +492,73 @@
     newHeadId.getName
   }
 
+  /**
+   * Read submodule information from .gitmodules
+   */
+  def getSubmodules(git: Git, tree: RevTree): List[SubmoduleInfo] = {
+    val repository = git.getRepository
+    getContentFromPath(git, tree, ".gitmodules", true).map { bytes =>
+      (try {
+        val config = new BlobBasedConfig(repository.getConfig(), bytes)
+        config.getSubsections("submodule").asScala.map { module =>
+          val path = config.getString("submodule", module, "path")
+          val url  = config.getString("submodule", module, "url")
+          SubmoduleInfo(module, path, url)
+        }
+      } catch {
+        case e: ConfigInvalidException => {
+          logger.error("Failed to load .gitmodules file for " + repository.getDirectory(), e)
+          Nil
+        }
+      }).toList
+    } getOrElse Nil
+	}
+
+  /**
+   * Get object content of the given path as byte array from the Git repository.
+   *
+   * @param git the Git object
+   * @param revTree the rev tree
+   * @param path the path
+   * @param fetchLargeFile if false then returns None for the large file
+   * @return the byte array of content or None if object does not exist
+   */
+  def getContentFromPath(git: Git, revTree: RevTree, path: String, fetchLargeFile: Boolean): Option[Array[Byte]] = {
+    @scala.annotation.tailrec
+    def getPathObjectId(path: String, walk: TreeWalk): Option[ObjectId] = walk.next match {
+      case true if(walk.getPathString == path) => Some(walk.getObjectId(0))
+      case true  => getPathObjectId(path, walk)
+      case false => None
+    }
+
+    using(new TreeWalk(git.getRepository)){ treeWalk =>
+      treeWalk.addTree(revTree)
+      treeWalk.setRecursive(true)
+      getPathObjectId(path, treeWalk)
+    } flatMap { objectId =>
+      getContentFromId(git, objectId, fetchLargeFile)
+    }
+  }
+
+  /**
+   * Get object content of the given object id as byte array from the Git repository.
+   *
+   * @param git the Git object
+   * @param id the object id
+   * @param fetchLargeFile if false then returns None for the large file
+   * @return the byte array of content or None if object does not exist
+   */
+  def getContentFromId(git: Git, id: ObjectId, fetchLargeFile: Boolean): Option[Array[Byte]] = try {
+    val loader = git.getRepository.getObjectDatabase.open(id)
+    if(fetchLargeFile == false && FileUtil.isLarge(loader.getSize)){
+      None
+    } else {
+      using(git.getRepository.getObjectDatabase){ db =>
+        Some(db.open(id).getBytes)
+      }
+    }
+  } catch {
+    case e: MissingObjectException => None
+  }
+
 }
diff --git a/src/main/twirl/account/group.scala.html b/src/main/twirl/account/group.scala.html
new file mode 100644
index 0000000..4826352
--- /dev/null
+++ b/src/main/twirl/account/group.scala.html
@@ -0,0 +1,140 @@
+@(account: Option[model.Account], members: List[model.GroupMember])(implicit context: app.Context)
+@import context._
+@import view.helpers._
+@html.main(if(account.isEmpty) "Create group" else "Edit group"){
+<div>
+  <form id="form" method="post" action="@if(account.isEmpty){@path/groups/new} else {@path/@account.get.userName/_editgroup}" validate="true">
+      <div class="row-fluid">
+        <div class="span5">
+          <fieldset>
+            <label for="groupName" class="strong">Group name</label>
+            <div>
+              <span id="error-groupName" class="error"></span>
+            </div>
+            <input type="text" name="groupName" id="groupName" value="@account.map(_.userName)"@if(account.isDefined){ readonly}/>
+          </fieldset>
+          <fieldset>
+            <label class="strong">URL (Optional)</label>
+            <div>
+              <span id="error-url" class="error"></span>
+            </div>
+            <input type="text" name="url" id="url" style="width: 300px;" value="@account.map(_.url)"/>
+          </fieldset>
+          <fieldset>
+            <label for="avatar" class="strong">Image (Optional)</label>
+            @helper.html.uploadavatar(account)
+          </fieldset>
+        </div>
+        <div class="span7">
+          <fieldset>
+            <label class="strong">Members</label>
+            <ul id="member-list" class="collaborator">
+            </ul>
+            @helper.html.account("memberName", 200)
+            <input type="button" class="btn" value="Add" id="addMember"/>
+            <input type="hidden" id="members" name="members" value="@members.map(member => member.userName + ":" + member.isManager).mkString(",")"/>
+            <div>
+              <span class="error" id="error-members"></span>
+            </div>
+          </fieldset>
+        </div>
+      </div>
+      <fieldset class="margin">
+        @if(account.isDefined){
+          <div class="pull-right">
+            <a href="@url(account.get.userName)/_deletegroup" id="delete" class="btn btn-danger">Delete Group</a>
+          </div>
+        }
+        <input type="submit" class="btn btn-success" value="@if(account.isEmpty){Create Group} else {Update Group}"/>
+        @if(account.isDefined){
+          <a href="@url(account.get.userName)" class="btn">Cancel</a>
+        }
+      </fieldset>
+  </form>
+</div>
+}
+<script>
+$(function(){
+  $('input[type=submit]').click(function(){
+    updateMembers();
+  });
+
+  $('#addMember').click(function(){
+    $('#error-memberName').text('');
+    var userName = $('#memberName').val();
+
+    // check empty
+    if($.trim(userName) == ''){
+      return false;
+    }
+
+    // check duplication
+    var exists = $('#member-list li').filter(function(){
+      return $(this).data('name') == userName;
+    }).length > 0;
+    if(exists){
+      $('#error-memberName').text('User has been already added.');
+      return false;
+    }
+
+    // check existence
+    $.post('@path/admin/users/_usercheck', {
+      'userName': userName
+    }, function(data, status){
+      if(data == 'true'){
+        addMemberHTML(userName, false);
+      } else {
+        $('#error-memberName').text('User does not exist.');
+      }
+    });
+  });
+
+  $(document).on('click', '.remove', function(){
+    $(this).parent().remove();
+  });
+
+  // Don't submit form by ENTER key
+  $('#memberName').keypress(function(e){
+    return !(e.keyCode == 13);
+  });
+
+  $('#delete').click(function(){
+    return confirm('Once you delete this group, there is no going back.\nAre you sure?');
+  });
+
+  @members.map { member =>
+    addMemberHTML('@member.userName', @member.isManager);
+  }
+
+  function addMemberHTML(userName, isManager){
+    var memberButton = $('<button type="button" class="btn btn-default btn-mini" value="false">Member</button>').data('name', userName);
+    if(!isManager){
+      memberButton.addClass('active');
+    }
+    var managerButton = $('<button type="button" class="btn btn-default btn-mini" value="true">Manager</button>').data('name', userName);
+    if(isManager){
+      managerButton.addClass('active');
+    }
+
+    $('#member-list').append($('<li>')
+      .data('name', userName)
+      .append($('<div class="btn-group is_manager" data-toggle="buttons-radio">')
+        .append(memberButton)
+        .append(managerButton))
+      .append(' ')
+      .append($('<a>').attr('href', '@path/' + userName).text(userName))
+      .append(' ')
+      .append($('<a href="#" class="remove pull-right">(remove)</a>')));
+  }
+
+  function updateMembers(){
+    var members = $('#member-list li').map(function(i, e){
+      var userName = $(e).data('name');
+      return userName + ':' + $('button.active').filter(function(i, e){
+        return $(e).data('name') == userName;
+      }).attr('value');
+    }).get().join(',');
+    $('#members').val(members);
+  }
+});
+</script>
\ No newline at end of file
diff --git a/src/main/twirl/account/main.scala.html b/src/main/twirl/account/main.scala.html
index 0b6cc6e..17e05c0 100644
--- a/src/main/twirl/account/main.scala.html
+++ b/src/main/twirl/account/main.scala.html
@@ -1,4 +1,5 @@
-@(account: model.Account, groupNames: List[String], active: String)(body: Html)(implicit context: app.Context)
+@(account: model.Account, groupNames: List[String], active: String,
+  isGroupManager: Boolean = false)(body: Html)(implicit context: app.Context)
 @import context._
 @import view.helpers._
 @html.main(account.userName){
@@ -41,6 +42,13 @@
               </div>
             </li>
           }
+          @if(loginAccount.isDefined && account.isGroupAccount && isGroupManager){
+            <li class="pull-right">
+              <div class="button-group">
+                <a href="@url(account.userName)/_editgroup" class="btn">Edit Group</a>
+              </div>
+            </li>
+          }
         </ul>
         @body
       </div>
diff --git a/src/main/twirl/account/members.scala.html b/src/main/twirl/account/members.scala.html
index 14d7c77..0e21d01 100644
--- a/src/main/twirl/account/members.scala.html
+++ b/src/main/twirl/account/members.scala.html
@@ -1,7 +1,7 @@
-@(account: model.Account, members: List[String])(implicit context: app.Context)
+@(account: model.Account, members: List[String], isGroupManager: Boolean)(implicit context: app.Context)
 @import context._
 @import view.helpers._
-@main(account, Nil, "members"){
+@main(account, Nil, "members", isGroupManager){
   @if(members.isEmpty){
     No members
   } else {
diff --git a/src/main/twirl/account/newrepo.scala.html b/src/main/twirl/account/newrepo.scala.html
new file mode 100644
index 0000000..b5f6c6a
--- /dev/null
+++ b/src/main/twirl/account/newrepo.scala.html
@@ -0,0 +1,73 @@
+@(groupNames: List[String])(implicit context: app.Context)
+@import context._
+@import view.helpers._
+@html.main("Create a New Repository"){
+<div style="width: 600px; margin: 10px auto;">
+  <form id="form" method="post" action="@path/new" validate="true">
+    <fieldset>
+      <label for="name" class="strong">Repository name:</label>
+      <div class="btn-group" style="margin-bottom: 10px;" id="owner-dropdown">
+        <button class="btn dropdown-toggle" data-toggle="dropdown">
+          <span class="strong">@avatar(loginAccount.get.userName, 20) @loginAccount.get.userName</span>
+          <span class="caret"></span>
+        </button>
+        <ul class="dropdown-menu">
+          <li><a href="javascript:void(0);" data-name="@loginAccount.get.userName"><i class="icon-ok"></i> <span>@avatar(loginAccount.get.userName, 20) @loginAccount.get.userName</span></a></li>
+          @groupNames.map { groupName =>
+            <li><a href="javascript:void(0);" data-name="@groupName"><i class="icon-white"></i> <span>@avatar(groupName, 20) @groupName</span></a></li>
+          }
+        </ul>
+        <input type="hidden" name="owner" id="owner" value="@loginAccount.get.userName"/>
+      </div>
+      <span class="slash">/</span>
+      <input type="text" name="name" id="name" />
+      <span id="error-name" class="error"></span>
+    </fieldset>
+    <fieldset>
+      <label for="description" class="strong">Description (optional):</label>
+      <input type="text" name="description" id="description" style="width: 95%;"/>
+    </fieldset>
+    <fieldset class="margin">
+      <label class="radio">
+        <input type="radio" name="isPrivate" value="false" checked>
+        <span class="strong"><img src="@assets/common/images/repo_public.png"/>&nbsp;</i>&nbsp;Public</span><br>
+        <div>
+          <span>All users and guests can read this repository.</span>
+        </div>
+      </label>
+    </fieldset>
+    <fieldset>
+      <label class="radio">
+        <input type="radio" name="isPrivate" value="true">
+        <span class="strong"><img src="@assets/common/images/repo_private.png"/>&nbsp;</i>&nbsp;Private</span><br>
+        <div>
+          <span>Only collaborators can read this repository.</span>
+        </div>
+      </label>
+    </fieldset>
+    <fieldset class="margin">
+      <label for="createReadme" class="checkbox">
+        <input type="checkbox" name="createReadme" id="createReadme"/>
+        <span class="strong">Initialize this repository with a README</span>
+        <div>
+          <span>This will allow you to <code>git clone</code> the repository immediately.</span>
+        </div>
+      </label>
+    </fieldset>
+    <fieldset class="margin">
+      <input type="submit" class="btn btn-success" value="Create repository"/>
+    </fieldset>
+  </form>
+</div>
+}
+<script>
+$('#owner-dropdown a').click(function(){
+  var userName = $(this).data('name');
+  $('#owner').val(userName);
+
+  $('#owner-dropdown i').attr('class', 'icon-white');
+  $(this).find('i').attr('class', 'icon-ok');
+
+  $('#owner-dropdown span.strong').html($(this).find('span').html());
+});
+</script>
diff --git a/src/main/twirl/account/repositories.scala.html b/src/main/twirl/account/repositories.scala.html
index f9037f5..100c2b4 100644
--- a/src/main/twirl/account/repositories.scala.html
+++ b/src/main/twirl/account/repositories.scala.html
@@ -1,7 +1,9 @@
-@(account: model.Account, groupNames: List[String], repositories: List[service.RepositoryService.RepositoryInfo])(implicit context: app.Context)
+@(account: model.Account, groupNames: List[String],
+  repositories: List[service.RepositoryService.RepositoryInfo],
+  isGroupManager: Boolean)(implicit context: app.Context)
 @import context._
 @import view.helpers._
-@main(account, groupNames, "repositories"){
+@main(account, groupNames, "repositories", isGroupManager){
   @if(repositories.isEmpty){
     No repositories
   } else {
diff --git a/src/main/twirl/admin/users/group.scala.html b/src/main/twirl/admin/users/group.scala.html
index abf64cb..37369aa 100644
--- a/src/main/twirl/admin/users/group.scala.html
+++ b/src/main/twirl/admin/users/group.scala.html
@@ -1,11 +1,11 @@
-@(account: Option[model.Account], members: List[String])(implicit context: app.Context)
+@(account: Option[model.Account], members: List[model.GroupMember])(implicit context: app.Context)
 @import context._
 @import view.helpers._
 @html.main(if(account.isEmpty) "New Group" else "Update Group"){
   @admin.html.menu("users"){
     <form method="POST" action="@if(account.isEmpty){@path/admin/users/_newgroup} else {@path/admin/users/@account.get.userName/_editgroup}" validate="true">
       <div class="row-fluid">
-        <div class="span7">
+        <div class="span5">
           <fieldset>
             <label for="groupName" class="strong">Group name</label>
             <div>
@@ -24,29 +24,23 @@
             <div>
               <span id="error-url" class="error"></span>
             </div>
-            <input type="text" name="url" id="url" style="width: 300px;" value="@account.map(_.url)"/>
+            <input type="text" name="url" id="url" value="@account.map(_.url)"/>
           </fieldset>
           <fieldset>
             <label for="avatar" class="strong">Image (Optional)</label>
             @helper.html.uploadavatar(account)
           </fieldset>
         </div>
-        <div class="span5">
+        <div class="span7">
           <fieldset>
             <label class="strong">Members</label>
-            <ul id="members" class="collaborator">
-              @members.map { userName =>
-                <li data-name="@userName">
-                  <a href="@path/@url(userName)">@userName</a>
-                  <a href="#" class="remove">(remove)</a>
-                </li>
-              }
+            <ul id="member-list" class="collaborator">
             </ul>
             @helper.html.account("memberName", 200)
             <input type="button" class="btn" value="Add" id="addMember"/>
-            <input type="hidden" id="memberNames" name="memberNames" value="@members.mkString(",")"/>
+            <input type="hidden" id="members" name="members" value="@members.map(member => member.userName + ":" + member.isManager).mkString(",")"/>
             <div>
-              <span class="error" id="error-memberName"></span>
+              <span class="error" id="error-members"></span>
             </div>
           </fieldset>
         </div>
@@ -60,6 +54,10 @@
 }
 <script>
 $(function(){
+  $('input[type=submit]').click(function(){
+    updateMembers();
+  });
+
   $('#addMember').click(function(){
     $('#error-memberName').text('');
     var userName = $('#memberName').val();
@@ -70,7 +68,7 @@
     }
 
     // check duplication
-    var exists = $('#members li').filter(function(){
+    var exists = $('#member-list li').filter(function(){
       return $(this).data('name') == userName;
     }).length > 0;
     if(exists){
@@ -83,19 +81,7 @@
       'userName': userName
     }, function(data, status){
       if(data == 'true'){
-        // add member
-        $('#members').append($('<li>')
-          .data('name', userName)
-          .append($('<a>').attr('href', '@path/' + userName).text(userName))
-          .append(' ')
-          .append($('<a>').attr('href', '#').addClass('remove').text('(remove)')));
-        $('#memberName').val('');
-
-        // update hidden value
-        var userNames = $('#members li').map(function(i, e){
-          return $(e).data('name');
-        }).get().join(',');
-        $('#memberNames').val(userNames);
+        addMemberHTML(userName, false);
       } else {
         $('#error-memberName').text('User does not exist.');
       }
@@ -103,20 +89,47 @@
   });
 
   $(document).on('click', '.remove', function(){
-    // remove member
     $(this).parent().remove();
-
-    // update hidden value
-    var userNames = $('#members li').map(function(i, e){
-      return $(e).data('name');
-    }).get().join(',');
-    $('#memberNames').val(userNames);
   });
 
   // Don't submit form by ENTER key
   $('#memberName').keypress(function(e){
-    console.log(e.keyCode);
     return !(e.keyCode == 13);
   });
+
+  @members.map { member =>
+    addMemberHTML('@member.userName', @member.isManager);
+  }
+
+  function addMemberHTML(userName, isManager){
+    var memberButton = $('<button type="button" class="btn btn-default btn-mini" value="false">Member</button>').data('name', userName);
+    if(!isManager){
+      memberButton.addClass('active');
+    }
+    var managerButton = $('<button type="button" class="btn btn-default btn-mini" value="true">Manager</button>').data('name', userName);
+    if(isManager){
+      managerButton.addClass('active');
+    }
+
+    $('#member-list').append($('<li>')
+      .data('name', userName)
+      .append($('<div class="btn-group is_manager" data-toggle="buttons-radio">')
+        .append(memberButton)
+        .append(managerButton))
+      .append(' ')
+      .append($('<a>').attr('href', '@path/' + userName).text(userName))
+      .append(' ')
+      .append($('<a href="#" class="remove pull-right">(remove)</a>')));
+  }
+
+  function updateMembers(){
+    var members = $('#member-list li').map(function(i, e){
+      var userName = $(e).data('name');
+      return userName + ':' + $('button.active').filter(function(i, e){
+        return $(e).data('name') == userName;
+      }).attr('value');
+    }).get().join(',');
+    $('#members').val(members);
+  }
 });
 </script>
\ No newline at end of file
diff --git a/src/main/twirl/header.scala.html b/src/main/twirl/header.scala.html
index 55f19ee..d7591ba 100644
--- a/src/main/twirl/header.scala.html
+++ b/src/main/twirl/header.scala.html
@@ -56,7 +56,7 @@
     <th class="box-header@if(active=="network"){ active}">
       <a href="@url(repository)/network/members">Network</a>
     </th>
-    @if(loginAccount.isDefined && (loginAccount.get.isAdmin || loginAccount.get.userName == repository.owner)){
+    @if(loginAccount.isDefined && (loginAccount.get.isAdmin || repository.managers.contains(loginAccount.get.userName))){
     <th class="box-header@if(active=="settings"){ active}">
       <a href="@url(repository)/settings">Settings</a>
     </th>
diff --git a/src/main/twirl/main.scala.html b/src/main/twirl/main.scala.html
index 0d73555..51ba07b 100644
--- a/src/main/twirl/main.scala.html
+++ b/src/main/twirl/main.scala.html
@@ -54,7 +54,11 @@
               }
               @if(loginAccount.isDefined){
                 <a href="@url(loginAccount.get.userName)" class="username menu">@avatar(loginAccount.get.userName, 20) @loginAccount.get.userName</a>
-                <a href="@path/new" class="menu" data-toggle="tooltip" data-placement="bottom" title="Create a new repo"><i class="icon-plus"></i></a>
+                <a class="dropdown-toggle menu" data-toggle="dropdown" href="#"><i class="icon-plus"></i><span class="caret" style="vertical-align: middle;"></span></a>
+                <ul class="dropdown-menu">
+                  <li><a href="@path/new">New repository</a></li>
+                  <li><a href="@path/groups/new">New group</a></li>
+                </ul>
                 <a href="@url(loginAccount.get.userName)/_edit" class="menu" data-toggle="tooltip" data-placement="bottom" title="Account settings"><i class="icon-user"></i></a>
                 @if(loginAccount.get.isAdmin){
                   <a href="@path/admin/users" class="menu" data-toggle="tooltip" data-placement="bottom" title="Administration"><i class="icon-wrench"></i></a>
diff --git a/src/main/twirl/newrepo.scala.html b/src/main/twirl/newrepo.scala.html
deleted file mode 100644
index 05fefbc..0000000
--- a/src/main/twirl/newrepo.scala.html
+++ /dev/null
@@ -1,73 +0,0 @@
-@(groupNames: List[String])(implicit context: app.Context)
-@import context._
-@import view.helpers._
-@main("Create a New Repository"){
-<div style="width: 600px; margin: 10px auto;">
-  <form id="form" method="post" action="@path/new" validate="true">
-    <fieldset>
-      <label for="name" class="strong">Repository name:</label>
-      <div class="btn-group" style="margin-bottom: 10px;" id="owner-dropdown">
-        <button class="btn dropdown-toggle" data-toggle="dropdown">
-          <span class="strong">@avatar(loginAccount.get.userName, 20) @loginAccount.get.userName</span>
-          <span class="caret"></span>
-        </button>
-        <ul class="dropdown-menu">
-          <li><a href="javascript:void(0);" data-name="@loginAccount.get.userName"><i class="icon-ok"></i> <span>@avatar(loginAccount.get.userName, 20) @loginAccount.get.userName</span></a></li>
-          @groupNames.map { groupName =>
-            <li><a href="javascript:void(0);" data-name="@groupName"><i class="icon-white"></i> <span>@avatar(groupName, 20) @groupName</span></a></li>
-          }
-        </ul>
-        <input type="hidden" name="owner" id="owner" value="@loginAccount.get.userName"/>
-      </div>
-      <span class="slash">/</span>
-      <input type="text" name="name" id="name" />
-      <span id="error-name" class="error"></span>
-    </fieldset>
-    <fieldset>
-      <label for="description" class="strong">Description (optional):</label>
-      <input type="text" name="description" id="description" style="width: 95%;"/>
-    </fieldset>
-    <fieldset class="margin">
-      <label class="radio">
-        <input type="radio" name="isPrivate" value="false" checked>
-        <span class="strong"><img src="@assets/common/images/repo_public.png"/>&nbsp;</i>&nbsp;Public</span><br>
-        <div>
-          <span>All users and guests can read this repository.</span>
-        </div>
-      </label>
-    </fieldset>
-    <fieldset>
-      <label class="radio">
-        <input type="radio" name="isPrivate" value="true">
-        <span class="strong"><img src="@assets/common/images/repo_private.png"/>&nbsp;</i>&nbsp;Private</span><br>
-        <div>
-          <span>Only collaborators can read this repository.</span>
-        </div>
-      </label>
-    </fieldset>
-    <fieldset class="margin">
-      <label for="createReadme" class="checkbox">
-        <input type="checkbox" name="createReadme" id="createReadme"/>
-        <span class="strong">Initialize this repository with a README</span>
-        <div>
-          <span>This will allow you to <code>git clone</code> the repository immediately.</span>
-        </div>
-      </label>
-    </fieldset>
-    <fieldset class="margin">
-      <input type="submit" class="btn btn-success" value="Create repository"/>
-    </fieldset>
-  </form>
-</div>
-}
-<script>
-$('#owner-dropdown a').click(function(){
-  var userName = $(this).data('name');
-  $('#owner').val(userName);
-
-  $('#owner-dropdown i').attr('class', 'icon-white');
-  $(this).find('i').attr('class', 'icon-ok');
-
-  $('#owner-dropdown span.strong').html($(this).find('span').html());
-});
-</script>
diff --git a/src/main/twirl/repo/branches.scala.html b/src/main/twirl/repo/branches.scala.html
index 219c7c1..bc26459 100644
--- a/src/main/twirl/repo/branches.scala.html
+++ b/src/main/twirl/repo/branches.scala.html
@@ -1,4 +1,4 @@
-@(branchInfo: List[(String, java.util.Date)],
+@(branchInfo: Seq[(String, java.util.Date)],
   hasWritePermission: Boolean,
   repository: service.RepositoryService.RepositoryInfo)(implicit context: app.Context)
 @import context._
diff --git a/src/main/twirl/repo/files.scala.html b/src/main/twirl/repo/files.scala.html
index 355a393..6b4739c 100644
--- a/src/main/twirl/repo/files.scala.html
+++ b/src/main/twirl/repo/files.scala.html
@@ -55,14 +55,22 @@
       <tr>
         <td width="16">
         @if(file.isDirectory){
-          <img src="@assets/common/images/folder.png"/>
+          @if(file.linkUrl.isDefined){
+            <img src="@assets/common/images/folder_link.png"/>
+          } else {
+            <img src="@assets/common/images/folder.png"/>
+          }
         } else {
           <img src="@assets/common/images/file.png"/>
         }
         </td>
         <td>
         @if(file.isDirectory){
-          <a href="@url(repository)/tree@{(encodeRefName(branch) :: pathList).mkString("/", "/", "/")}@file.name">@file.name</a>
+          @if(file.linkUrl.isDefined){
+            <a href="@file.linkUrl">@file.name</a>
+          } else {
+            <a href="@url(repository)/tree@{(encodeRefName(branch) :: pathList).mkString("/", "/", "/")}@file.name">@file.name</a>
+          }
         } else {
           <a href="@url(repository)/blob@{(encodeRefName(branch) :: pathList).mkString("/", "/", "/")}@file.name">@file.name</a>
         }
diff --git a/src/main/twirl/settings/collaborators.scala.html b/src/main/twirl/settings/collaborators.scala.html
index 8264764..cf894a4 100644
--- a/src/main/twirl/settings/collaborators.scala.html
+++ b/src/main/twirl/settings/collaborators.scala.html
@@ -13,6 +13,10 @@
           <a href="@url(collaboratorName)">@collaboratorName</a>
           @if(!isGroupRepository){
             <a href="@url(repository)/settings/collaborators/remove?name=@collaboratorName" class="remove">(remove)</a>
+          } else {
+            @if(repository.managers.contains(collaboratorName)){
+              (Manager)
+            }
           }
         </li>
       }
diff --git a/src/main/webapp/assets/common/images/folder_link.png b/src/main/webapp/assets/common/images/folder_link.png
new file mode 100644
index 0000000..b9b75f6
--- /dev/null
+++ b/src/main/webapp/assets/common/images/folder_link.png
Binary files differ
diff --git a/src/test/scala/service/AccountServiceServiceSpec.scala b/src/test/scala/service/AccountServiceServiceSpec.scala
deleted file mode 100644
index ba53327..0000000
--- a/src/test/scala/service/AccountServiceServiceSpec.scala
+++ /dev/null
@@ -1,78 +0,0 @@
-package service
-
-import org.specs2.mutable.Specification
-import java.util.Date
-
-class AccountServiceServiceSpec extends Specification with ServiceSpecBase {
-
-  "AccountService" should {
-    val RootMailAddress = "root@localhost"
-
-    "getAllUsers" in { withTestDB{
-      AccountService.getAllUsers() must be like{
-        case List(model.Account("root", "root", RootMailAddress, _, true, _, _, _, None, None, false, false)) => ok
-      }
-    }}
-
-    "getAccountByUserName" in { withTestDB{
-      AccountService.getAccountByUserName("root") must beSome.like{
-        case user => user.userName must_== "root"
-      }
-
-      AccountService.getAccountByUserName("invalid user name") must beNone
-    }}
-
-    "getAccountByMailAddress" in { withTestDB{
-      AccountService.getAccountByMailAddress(RootMailAddress) must beSome
-    }}
-
-    "updateLastLoginDate" in { withTestDB{
-      val root = "root"
-      def user() =
-        AccountService.getAccountByUserName(root).getOrElse(sys.error(s"user $root does not exists"))
-
-      user().lastLoginDate must beNone
-      val date1 = new Date
-      AccountService.updateLastLoginDate(root)
-      user().lastLoginDate must beSome.like{ case date =>
-        date must be_>(date1)
-      }
-      val date2 = new Date
-      Thread.sleep(1000)
-      AccountService.updateLastLoginDate(root)
-      user().lastLoginDate must beSome.like{ case date =>
-        date must be_>(date2)
-      }
-    }}
-
-    "updateAccount" in { withTestDB{
-      val root = "root"
-      def user() =
-        AccountService.getAccountByUserName(root).getOrElse(sys.error(s"user $root does not exists"))
-
-      val newAddress = "new mail address"
-      AccountService.updateAccount(user().copy(mailAddress = newAddress))
-      user().mailAddress must_== newAddress
-    }}
-
-    "group" in { withTestDB {
-      val group1 = "group1"
-      val user1 = "root"
-      AccountService.createGroup(group1, None)
-
-      AccountService.getGroupMembers(group1) must_== Nil
-      AccountService.getGroupsByUserName(user1) must_== Nil
-
-      AccountService.updateGroupMembers(group1, List(user1))
-
-      AccountService.getGroupMembers(group1) must_== List(user1)
-      AccountService.getGroupsByUserName(user1) must_== List(group1)
-
-      AccountService.updateGroupMembers(group1, Nil)
-
-      AccountService.getGroupMembers(group1) must_== Nil
-      AccountService.getGroupsByUserName(user1) must_== Nil
-    }}
-  }
-}
-
diff --git a/src/test/scala/service/AccountServiceSpec.scala b/src/test/scala/service/AccountServiceSpec.scala
new file mode 100644
index 0000000..344f8e3
--- /dev/null
+++ b/src/test/scala/service/AccountServiceSpec.scala
@@ -0,0 +1,79 @@
+package service
+
+import org.specs2.mutable.Specification
+import java.util.Date
+import model.GroupMember
+
+class AccountServiceSpec extends Specification with ServiceSpecBase {
+
+  "AccountService" should {
+    val RootMailAddress = "root@localhost"
+
+    "getAllUsers" in { withTestDB{
+      AccountService.getAllUsers() must be like{
+        case List(model.Account("root", "root", RootMailAddress, _, true, _, _, _, None, None, false, false)) => ok
+      }
+    }}
+
+    "getAccountByUserName" in { withTestDB{
+      AccountService.getAccountByUserName("root") must beSome.like{
+        case user => user.userName must_== "root"
+      }
+
+      AccountService.getAccountByUserName("invalid user name") must beNone
+    }}
+
+    "getAccountByMailAddress" in { withTestDB{
+      AccountService.getAccountByMailAddress(RootMailAddress) must beSome
+    }}
+
+    "updateLastLoginDate" in { withTestDB{
+      val root = "root"
+      def user() =
+        AccountService.getAccountByUserName(root).getOrElse(sys.error(s"user $root does not exists"))
+
+      user().lastLoginDate must beNone
+      val date1 = new Date
+      AccountService.updateLastLoginDate(root)
+      user().lastLoginDate must beSome.like{ case date =>
+        date must be_>(date1)
+      }
+      val date2 = new Date
+      Thread.sleep(1000)
+      AccountService.updateLastLoginDate(root)
+      user().lastLoginDate must beSome.like{ case date =>
+        date must be_>(date2)
+      }
+    }}
+
+    "updateAccount" in { withTestDB{
+      val root = "root"
+      def user() =
+        AccountService.getAccountByUserName(root).getOrElse(sys.error(s"user $root does not exists"))
+
+      val newAddress = "new mail address"
+      AccountService.updateAccount(user().copy(mailAddress = newAddress))
+      user().mailAddress must_== newAddress
+    }}
+
+    "group" in { withTestDB {
+      val group1 = "group1"
+      val user1 = "root"
+      AccountService.createGroup(group1, None)
+
+      AccountService.getGroupMembers(group1) must_== Nil
+      AccountService.getGroupsByUserName(user1) must_== Nil
+
+      AccountService.updateGroupMembers(group1, List((user1, true)))
+
+      AccountService.getGroupMembers(group1) must_== List(GroupMember(group1, user1, true))
+      AccountService.getGroupsByUserName(user1) must_== List(group1)
+
+      AccountService.updateGroupMembers(group1, Nil)
+
+      AccountService.getGroupMembers(group1) must_== Nil
+      AccountService.getGroupsByUserName(user1) must_== Nil
+    }}
+  }
+}
+