OnyX

From Applepedia

Onyx is a utility for maintenance, optimization, and personalization for MacOS X. It also makes it possible to configure certain hidden parameters of Finder and the Dock and to remove a certain number of files and repertories that become cumbersome to you.

OnyX
Min/Max OS Support	10.3/ 10.3
License	Free
Category	Utilities - Maintenance
Installer	No
PowerPC Traitor	{{{universal}}}
Website	Titanium Software