Suggestion - Mobile StrokeIt

If you may make StrokeIt available for mobile platforms, you can make a lot of money by selling it on Google Play. It may detect two fingers instead of right click, and the rest will be the same. It would be great, especially considering the lack of a usable keyboard or mouse on these devices, and hence even greater need for being able to do things with simple gestures.

That would indeed be great! But I don't think Jeff has the time, he's often away. There is GMD Gesture Control for Android, which does some nice things, but I think it can only recognise a limited number of gestures so far—only gestures that are a combination of Up/Down/Left/Right—, and the recognition doesn't appear to be stellar so far. But it is actively worked on, so who knows!

There is also some gesture support in Nova Launcher (and Apex too I believe). You can use one-and-two finger swipes, rotation, etc.