http://w3.win.tue.nl/nl/onderzoek/on...t_sequoiaview/ from the University of Technology, Eindhoven, Germany.

SequoiaView is a free file browser that graphically shows the files and folders on your disk and the space they take up. If you're wondering what files are using up your hard drive space, this utility will let you visually see what is taking up valuable room.

As you move your mouse pointer over the file layout, the file path and name appear as a "tooltip" message next to your mouse pointer.

I use it to identify how space is being used on my drive and to decide what to delete to free up space. I've found large files I'd forgotten about that don't appear obvious when looking at your files and folders.

For Windows 95 / 98 / ME / NT4 / 2000 / XP.