MacUpdate.com is the beginning of the Apple eco system. Looking for a new Mac, iPod, iPhone or iPad? This is the place to start your search.

Download.cnet/mac is now the combination of the old VersionTracker and cnet's mac section. It is complete but not updated as fast as MacUpdate.com

Pure-Mac.com is a poor mans MacUpdate. MacUpdate has thousands more titles and is better presented and organized. But some people like but it has been almost a year since it has been updated.