SourceTree - Mac and Windows client for Mercurial and Git.
Git - Git is a free and open source version control system designed to handle everything from small to very large projects with speed and efficiency. It is easy to learn and lightweight with lighting fast performance that outclasses competitors.
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Atlassian Bitbucket Server - Atlassian Bitbucket Server is a scalable collaborative Git solution.
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
Mercurial SCM - Mercurial is a free, distributed source control management tool.