Package k4dirstat

Graphical Directory Statistics for Used Disk Space

KDirStat (KDE Directory Statistics) is a utility program that sums up
disk usage for directory trees - very much like the Unix 'du' command.
It can also help you clean up used space.

General Commands (Section 1)
Shows where all your disk space has gone and helps you clean it up. The size of files and directory is shown using treemapping.