SourceAnywhere!

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.

Darcs is an advanced revision control system, for source code or other files. It is fully distributed, and supports lazy fetching of the remote repository (fetching only what is needed at the time, rather than all history). It works best with text files, but it can also store binary files.

Team Foundation Server (commonly abbreviated TFS) is a Microsoft offering for source control, data collection, reporting, and project tracking, and is intended for collaborative software development projects. It is available either as stand-alone software, or as the server side back end platform for Visual Studio Team System. (VSTS)

The Perforce Software Configuration Management System features comprehensive SCM capabilities built around a scalable client/server architecture. Users can access the Perforce Server through a range of Perforce client software. Perforce can be deployed quickly and easily, and requires minimal administration even for large or distributed sites. The Perforce Visual Client, P4V, provides a graphical interface on Windows, Mac OS X, Linux, Solaris and FreeBSD. It includes a built-in merge feature, as well as Perforce's revision graph and Time-lapse View tools. »

SnapshotCM is an intuitive version-control tool with project-level branching and merging that's also easy to install and maintain. Its powerful capabilities let you easily manage changes from multiple developers across multiple releases with confidence.

AnkhSVN is a Subversion SourceControl Provider for Visual Studio. The software allows you to perform the most common version control operations directly from inside the Microsoft Visual Studio IDE. With AnkhSVN you no longer need to leave your IDE to perform tasks like viewing the status of your source code, updating your Subversion working copy and committing changes. You can even browse your repository and you can plug-in your favorite diff tool.

Source Control, Version Control and Bug Tracking

Microsoft Visual SourceSafe (VSS) is a source control software package oriented towards small software development projects.

Plastic SCM is a commercial SCM system developed by Codice Software. Plastic tries to focus on big repositories, parallel development, branching and merging and security.

Free, easy to implement UI for Subversion which includes: