Need a program to monitor my diskspace

[Czar]

I need some program that can show me how much disk space I'm wasting in each directory on my disks, and graphs would be nice

 

[StevenYoo]

Norton System Doctor and System Information (part of Norton Utilities) will monitor with nice charts and stuff, but it's a HUGE resource hog.

Coolmon is a nice app to display info on your desktop (like disk space used/free/total). No graphs with this one though.