Plastic SCM Community Edition has just been released. Plastic is a full featured distributed version control system specifically designed for .NET developers. If you're considering moving from VSS or SVN to something newer like Git or Hg, give a try to Plastic. It is very strong with branching and merging, it is distributed but it comes with a very rich GUI, branch explorer and so on. Community Edition is now FREE for teams up to 15 developers.