SourceTree - Mac and Windows client for Mercurial and Git.
OctoDroid - Mobile GitHub client for Android.
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Gittyup - Understand your Git history! Contribute to Murmele/Gittyup development by creating an account on GitHub.
TortoiseGit - TortoiseGit is an easy to use client for the Git distributed revision control system.
Sublime Merge - Fast git client with integrated merge tool from the makers of Sublime Text