SourceGear Vault is a source code control application.  It's handy if you do your own software development.  It's designed to be a replacement for Microsoft Visual SourceSafe.

My programming skills have atrophied over the years since my current position focuses on system administration.  Consequently, my software development is currently limited to visual basic in a Microsoft Office Environment, so source code control isn't something that I currently have a need for.  In fact, the folks in the Sarasota Developers .NET Group would laugh and say that I'm not a "real" programmer.  However, Stan Schultes (a professional developer and a REAL programmer) says that this is a great product.

Licensing is free in a single programmer environment for personal use.  To find out more or download the program, go to http://www.sourcegear.com/vault/index.html.