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.
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
gitg - gitg is a git repository viewer targeting gtk+/GNOME.
SourceTree - Mac and Windows client for Mercurial and Git.
Fork - Fast and Friendly Git Client for Mac
GitX-dev - Free - GPL v2