Is there a program that shows you the distribution of space on your hard drive for mac like there is for windows?

Grand Perspective seems to be what you’re looking for, and has worked fairly well for me.

Disk Inventory X is another freeware.

Whatsize is another freeware that does a great job of breaking down all the files (even invisibles), but not in a graphical way. It has saved me plenty of time searching out huge log files.

Another vote for Grand Perspective. :]

While I am normally a visual user, both Grand Perspective and Disk Inventory look like some sort of bad 80’s sci-fi interfaces. Another vote for WhatSize.

A new app similar to WhatSize is out: Baseline.

Also, WhatSize was recently updated with a slightly new interface and additional features. Still free, but advanced functionality will cost you $12.99.