QDirStat is a graphical application to show where your disk space
has gone and to help you to clean it up.

This is a Qt-only port of the old Qt3/KDE3-based KDirStat, now
based on the latest Qt 5. It does not need any KDE libs or
infrastructure. It runs on every X11-based desktop on Linux, BSD
and other Unix-like systems.

QDirStat has a number of new features compared to KDirStat. To
name a few:

- Multi-selection in both the tree and the treemap.

- Unlimited number of user-defined cleanup actions.

- Properly show errors of cleanup actions (and their output, if
desired).

- File categories (MIME types) and their treemap color are now
configurable.

- Exclude rules for directories are easily configurable.

- Desktop-agnostic; no longer relies on KDE or any other specific
desktop.

For more details and screenshots, see

https://github.com/shundhammer/qdirstat

and the local documentation in

/usr/share/doc/packages/qdirstat/README.md