Microsoft Team Foundation Server Alternatives

GitHub is a web-based hosting service for projects that use the Git revision control system. It is written in Ruby on Rails by Logical Awesome developers Chris Wanstrath, PJ Hyett, and Tom Preston-Werner.

GitLab is a on-premise or hosted Git repository management tool. It also includes code reviews, issue tracking, wikis, and continuous integration.

Git is a free & open source, distributed version control system designed to handle everything from small to very large projects with speed and efficiency.

SourceForge empowers open source developers to create powerful software and share it with the world. They also feature a business software comparison directory that lists over 50,000 software titles.

Code collaboration version control. Offers hosted (freemium) for limited (5) users, and a commercial self-hosted for a subscription. Free licenses are available for qualified open source projects, nonprofits, and classrooms.

Trusted by 11,000+ businesses, JIRA is the leading bug tracking, issue tracking and project management tool.

TortoiseSVN is a really easy to use Revision control / version control / source control software for Windows.

Mercurial is a free, distributed source control management tool. It efficiently handles projects of any size and offers an easy and intuitive command line interface. Mercurial efficiently handles projects of any size and kind.

Apache Subversion (SVN) is a centralized version control system similar to CVS (Concurrent Versions System) , but based on the concept of change-sets instead.

ZenTao is an open source project management tool, supporting Scrum. It integrates product management, project management, bug management and QA management, etc., covering all lifecycle of software development.