OS X: So you’ve upgraded to Mountain Lion, but you’ve found a few things that annoy you about the OS. Mountain Tweaks is a dead simple app that will fix those problems in just a few clicks.
Mayve you don’t like the leather look of iCal and Address Book, or maybe you want to change the Notification Center’s background. Or maybe you want to disable GateKeeper altogether and install Mac apps from anywhere you see fit (not just the App Store). Mountain Tweaks follows in the footsteps of previously mentioned Lion Tweaks, giving you all the options to fix OS X’s biggest annoyances. Mountain Tweaks contains all the previous Lion-based toggles, as well as a few new ones for Mountain Lion. The developer notes that Mountain Tweaks will update with even more toggles as people discover them, so download it now and keep it updated!
Mountain Tweaks is a free download for OS X Lion and Mountain Lion.