GitPrep : GitPrep is Github clone. you can install portable github system into unix/linux. You can create users and repositories without limitation.
git-deploy : Straightforward, Heroku-style, push-based deployment. Your deploys can become as simple as this:
$ git push production master
BlackBox : Safely store secrets in a VCS repo (i.e. Git, Mercurial, Subversion or Perforce).
gitfs : gitfs is a FUSE file system that fully integrates with git. You can mount a remote repository’s branch locally, and any subsequent changes made to the...
Gerrit : Web based code review and project management for Git based projects.
Git Extensions is the only graphical user interface for Git that allows you control Git without using the commandline. It comes with a manual and video tutorials to get you started quickly.