From the programmers at Lifehacker, Rocker is cool utility that lets you perform common computing tasks just by rocking your fingers across you mouse. For example, you could go forward and backward in Internet Explorer just by "rocking" across the mouse. Rocker actually requires that you hold one mouse button down while you click the other in a rocking motion. You can rock right to left or left to right and each direction gives you a different results. It's kind of weird at first, but those that get used to it say it's more natural to them that the usual clicking and double-clicking.
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