Filelight is a Linux utility that creates a concentric graph of your computer's disk usage. Each color represents a different type of file, such as documents or apps, so it's easy to tell which is the biggest bully on the block. I found a utility like this for Mac OS X over on TUAW by the name of Disk Inventory X - has anyone seen a similar app for Windows?
No specific OS flavor is required, though Qt 3.2 and KDE 3.2 are. Filelight is available from MethyBlue and is released under the GNU General Public License.
