gt5 is a handy shellscript that extends the linux command du (disk usage). It can be run from the console or remotely over ssh. Nothing to be installed. It uses GNU tools like head, sed, awk and lynx. It generates html which is then passed to lynx to be displayed.
You can install it via: sudo apt-get install gt5
You will also find screen shots at: http://gt5.sourceforge.net