Fork - Fast and Friendly Git Client for Mac
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Git2Go - The Git client for iPhone and iPad you always wanted
SmartGit - SmartGit is a front-end for the distributed version control system Git and runs on Windows, Mac OS...
Source iOS - The best git client and code editor for iOS.
SourceTree - Mac and Windows client for Mercurial and Git.