GITK - The GITK - Generalized Interface Tool Kit is a set of libraries, which form a (user) interface...
Aurees - A Git client for Windows, Mac and Linux.
Sublime Merge - Fast git client with integrated merge tool from the makers of Sublime Text
Qgit - Qgit is one of the smart tools that implement a GUIO for the most common SIGT commands like pop, push, shave and apply matches, making the developer browse revision tree, view patch content, or change files.
OctoDroid - Mobile GitHub client for Android.
gitg - gitg is a git repository viewer targeting gtk+/GNOME.