Listing the largest to lowest files on your Mac

[Garrett]

My Mac only has 9gb left, and I would like to clear that up to about 25gb. Is there any way through Finder or Terminal, to figure out what the largest files on my Mac?

[Not-a-cliche]

http://www.id-design.com/software/whatsize/

[Eidorian]

http://www.derlien.com/

What Size chokes on network NFS mounts.