Mercurial SCM - Mercurial is a free, distributed source control management tool.
Git for Windows - We bring the awesome Git SCM to Windows
IBM Engineering Workflow Management - IBM Engineering Workflow Management lets you use one tool to collaborate across teams, manage code, run meetings, plan sprints and track work - cloud or on-premise.
Fossil - Simple, high-reliability, distributed software configuration management
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.
Bazaar - Bazaar is a tool for helping people collaborate.