OnyX is a maintenance, optimization, and personalization utility. It also makes it possible to configure certain hidden parameters of the Finder, Dock, and Safari, to remove a certain number of files and folders that may become cumbersome, preview the different logs and CrashReporter, and more.
If you like using Onyx you can make a donation at author's site.
Requirements:
OS X 10.4 or later
Version 1.5.3 for OS X 10.3 is available by clicking
here.
Version 1.3.1 for OS X 10.2 is available by clicking
here.
Universal Binary