Marco Borgna Blog:
Araxis Merge is the visual file comparison/merging and folder synchronization application from Araxis.
The user interface is localized in English, German, French, International Spanish and Chinese (Traditional and Simplified).
I LOVE IT! It saved me a lot of times. Simple, cool and clean. A must have for every professional programmer.
A site with a big collection of interessting utility (disk usage tools too)
easycleaner a lot of functions and available in many languages.
Give it a try.
(i still prefere my way to display disk folder sizes, but windirstat is more productive)
GrandPerspective is a small utility application for Mac OS X that graphically shows the disk usage within a file system. It can help you to manage your disk, as you can easily spot which files and folders take up the most space. It uses a so called tree map for visualisation. Each file is shown as a rectangle with an area proportional to the file's size. Files in the same folder appear together, but their placement is otherwise arbitrary.
And also somebody has see this type of multilevel pie used in any others field? It's really used only to show folders size ?
it' s the coolest approach to disk usage display: TRY it!
You can also try KDIRSTAT wich is more serious and with a lot of functions, but less informative. It use treemap display: lot of confunsing squre one inside other to display disk analysis.
check also http://www.dmoz.org/Computers/Software/Disk_Management/Usage_Analysis/
For windows a lot of disk usage tools are available (most as shareware):
FolderSizes - Disk Space Management Software