baobab is able to scan either specific folders or the whole filesystem (local and remote), in order to give the user a graphical tree representation including each directory size or percentage in the branch. It also auto-detects in real-time any change made to your home directory as far as any mounted/unmounted device. A graphical treemap window is also provided for any selected folder.
A detailed documentation on the program could be read at: http://www.mate.org/projects/baobab
Fabio MARZOCCA <email@example.com>