Originally posted by Mr. Me
First, this is not the question that the OP asked.
He didn't ask wether Mac OS X was Windows either.
Second, just because people write utlities doesn't mean they are needed.
Wrong. It's a simple issue of supply and demand. If there's no demand for it, the supply will not be there either.
It should not go unnoticed that, with the exception of Coctail, everything you linked to are monitors, not repair utilities.
It's Cocktail, not Coctail.
Google for OnyX, MacJanitor, TinkerTool.