ein paar projekte in git/svn
Gerrit, a Git-based system for managing code review, is helping to spread the popular distributed revision control system into Android-using companies, many of which have heavy quality assurance, management, and legal processes around software.
etckeeper is a collection of tools to let /etc be stored in a git, mercurial, darcs, or bzr repository. It hooks into apt (and other package managers) to automatically commit changes made to /etc during package upgrades. It tracks file metadata that revison control systems do not normally support, but that is important for /etc, such as the permissions of /etc/shadow. It's quite modular and configurable, while also being simple to use if you understand the basics of working with revision control.
GitX is a git GUI specifically for Mac OS X. It currently features a history viewer much like gitk and a commit GUI like git gui