GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Gitential - Analytics for Git Repositories
SmartGit - SmartGit is a front-end for the distributed version control system Git and runs on Windows, Mac OS...
Git-Repo - Manage Gitlab, GitHub and Bitbucket from the command line
SourceTree - Mac and Windows client for Mercurial and Git.
Diff So Fancy - Make Git diffs look good