VisualSVN - VisualSVN - Subversion plugin for Visual Studio
Subversion Edge - What is Subversion Edge? A certified software stack containing the latest versions
Mercurial SCM - Mercurial is a free, distributed source control management tool.
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
TortoiseSVN - The coolest interface to (Sub)version control
AnkhSVN - AnkhSVN is a Subversion SourceControl Provider for Visual Studio.