Wikipedia
AnkhSVN is a free Subversion client, implemented as a source-control plug-in for Microsoft Visual Studio 2005, 2008, 2010, 2012 and 2013+. It is released under the Apache License.
It provides an interface to perform the most common revision control operations directly from inside the Microsoft Visual Studio IDE. The AnkhSVN project has several mailing lists and there is also an IRC channel on freenode.
Previous releases of AnkhSVN (1.X) support Microsoft Visual Studio .NET 2002 and 2003.
The AnkhSVN 2.0 Source Control Provider for Visual Studio 2008 and later is a nearly complete rewrite of the old AnkhSVN Add-In. This rewrite was necessary to take advantage of the new Source Code Control (SCC) Virtual Application Programming Interface(VAPI) introduced in Visual Studio 2005. This new SCC VAPI replaces the Microsoft Source Code Control Interface (MSSCCI) API of older Visual Studio releases and makes it possible to replace all SCC handling within Visual Studio. Where the old SCC API required its implementation to always follow the CheckOut-CheckIn principle, the new SCC VAPI just passes individual requests to the SCC API. This allows implementations to fully replace the usual workflow with the Update-Merge workflow Subversion usually provides.
Just like the old SCC API, the new SCC API makes the projects aware that there is a SCC provider, to which they should communicate which files are part of a projects source and which are just intermediate or output files. (AnkhSVN 1.X and other non SCC Add-Ins have to guess this for themselves). This makes AnkhSVN 2.0 (or higher) compatible with virtually every SCC capable project in Visual Studio.
AnkhSVN derives its name from the Egyptian symbol ankh, which represents the key of life.