A VersionControlSystem from MicrosoftCorporation. Roughly on par with CVS.
STAY AWAY!!!
It might be free (as in beer) and tightly integrated into the VisualStudio IDE, but it is broken and dangerous:
Visual SourceSafe: Microsoft's Source Destruction SystemVisual SourceSafe Version Control: Unsafe at any Speed?2 pages link to VisualSourceSafe:
