Gitential - Analytics for Git Repositories
SourceTree - Mac and Windows client for Mercurial and Git.
Git-Repo - Manage Gitlab, GitHub and Bitbucket from the command line
SmartGit - SmartGit is a front-end for the distributed version control system Git and runs on Windows, Mac OS...
GVfs - Git Virtual File System (by Microsoft)
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.