Quitter is a free app for Mac that automatically quits applications after they’ve been inactive for a predetermined period of time. Best for those that need to maintain focus without distractions or even just to minimize CPU usage, Quitter will close your unused apps so you don’t have to. Whether it’s the email app, Twitter or your browser, each app can be customized to your specifications. Manually enter the amount of time that must pass before it quits and when that time is up, it is taken care of. You can even set it to simply hide the app instead of close it if it’s a program you’ll eventually need to use.