SmartGit - SmartGit is a front-end for the distributed version control system Git and runs on Windows, Mac OS...
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Fork - Fast and Friendly Git Client for Mac
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
RelaGit - The elegant solution to graphical version control.
SourceTree - Mac and Windows client for Mercurial and Git.