Disk Inventory X is a disk usage utility for Mac OS X. It shows the sizes of files and folders in a special graphical way called "treemaps".
If you've ever wondered where all your disk space has gone, Disk Inventory X will help you to answer this question.
The layout algorithm is based on KDirStat. The idea to develop this program came to me when a fellow of mine showed me his creation WinDirStat.
by Tjark Derlien.