CleanMyMac from MacPaw is a MUST. Think of it as CCleaner for Windows, but on steroids, and on OS X. Run CleanMyMac once a week, and you'll save a massive amount of hard drive space, and your Mac will be significantly faster.
NOTE: CleanMyMac is a PAID application.
[URL="http://macpaw.com/cleanmymac"]Click this link to go to the CleanMyMac homepage![/URL]
This and other posts I find absurd.
CleanMyMac is a MUST AVOID application. We've seen dozens of threads on this forum posting problems caused by CleanMyMac, and there are almost certainly many more people who didn't post here or didn't know that CleanMyMac caused their problems. If you're smart enough to figure out the way CleanMyMac can be safely used, you shouldn't need it in the first place. I'd highly recommend avoiding it like the plague.
jW