Spotlight (included with Mac OSX): http://support.apple.com/kb/HT2531 Spotlight starts finding files when you begin typing in the Spotlight search field. Time Machine (included with Mac OSX): Time Machine is the built-in backup feature of OS X that works with your Mac and an external drive or AirPort Time Capsule. Connect the drive, tell Time Machine to use it, and relax. SuperDuper! (free, more options to buy): http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html SuperDuper! will clone your entire Mac disk. AppCleaner (free): http://www.freemacsoft.net/appcleaner/ AppCleaner is a small application which allows you to thoroughly uninstall unwanted apps. Memory Clean (free): Mac App Store - https://itunes.apple.com/us/app/memory-clean/id451444120?mt=12 Memory Clean is the ultimate app for optimizing your Mac's memory and is best used after you have finished using a memory (RAM) intensive app or game. Onyx (free): http://ww...