Gitea - A painless self-hosted Git service
django-git - A simple Gitweb replacement built with Django.
Bonobo Git Server - Set up your own self hosted git server on IIS for Windows.
GitList - GitList allows you to browse repositories using your favorite browser, viewing files under...
GitBucket - GitBucket is the easily installable open-source GitHub clone written with Scala.
Gitolite - Setup git hosting on a central server, with fine-grained access control