WebSVN - Online subversion repository browser
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.
SnailSVN - Similar to Tortoise SVN for Windows but integrated into Finder
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
VisualSVN - VisualSVN - Subversion plugin for Visual Studio
Mercurial SCM - Mercurial is a free, distributed source control management tool.