Add additional functionality to your magic mouse or trackpad with MagicPrefs, an application which allows you to add numerous new functions to your magic mouse or trackpad if you're unsatisfied with Apple's limited selection. It is one of the absolutely essential applications for your Mac. It features the ability to bind a variable number of finger clicks, taps, swipes, pinch and other gestures to functions like Middle Click , Hold Down Both Mouse Buttons , Spaces , Expose, Dashboard , Recent Applications, Tweet, Read Tweets, Google Reader etc.