Visualization of disk usage: filelight

Did you ever run out of space? And then trying "du" on every directory, to find to largest files and directory and to decide, what can be deleted?
There is a nice tool to visualize the disk usage: filelight

The manpage states:

filelight  allows  you  to  understand exactly where your disk space is being used by graphically representing your file system  as  a  set  of concentric  segmented  rings, where each segment subtends an angle proportional to the disk space occupied by that file or directory.

And here a screenshot:

You can navigate per mouse click inside the graphic... Very nice...