Xinorbis
Xinorbis is a simple but powerful hard disk analyser. Using a sophisticated mix of graphs, tables and tree displays, it gives the user a complete overview of the contents of a hard disk (or directory). It makes it easy to see the contents, structure and file distribution and file composition of a whole hard disk, directory, or mapped network drive. Includes full report creation.
http://www.freshney.org/xinorbis/index.htm