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Like waving a wand and your PC does things..
The best thing you will ever find for using mouse gestures. I've used it a few years. There is nothing better.
Pros: It's easy to disable it for games; just right click the system tray icon.
Lots of options to achieve what you want without being overwhelming.
Cons: If you switch from a dual screen to a single screen then a taskbar button appears.
Needs to be run as administrator to be able to launch some programs.