Also ONYX or Main Menu are good batch utilities. I use MainMenu, but ONYX is also good. Using either one will help keep your Mac running well.
[EDIT- These are really just advanced uses of Apple script, at least ONYX and MacSweeper (not noted). I really have admiration for these utilties that basicly run allow a person to run standard OS maitnce routeens with out needing to know how command line works. Brilliant! They also allow access to other features of OSX that you might not easly find through the normal GUI if at all.