FunMouse - The internet phenomenon the world is talking about . . .
Gesturefy - Customizable mouse gesture addon, which supports over 40 different actions. Features:
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crxMouse Chrome Gestures - Boost browsing productivity with mouse navigation shortcuts - simple Mouse Gestures, Super Drag, Wheel Gestures, Rocker Gestures.
Easystroke - Easystroke is a gesture-recognition application for X11.