I previously posted an article describing how to use the tool fsnap.exe to list all files installed in a specific path on a computer. This tool can be useful in many scenarios, such as locating orphaned files left behind by Visual Studio 2005 beta build.
Frank Dzaebel posted a comment on one of my blog posts this morning with a pointer to a tool he wrote that provides a graphical user interface front end to make the output generated by fsnap.exe easier to understand and sort. The tool looks pretty nice, and he provides downloadable source code as well. You can check out that tool at this location.