Though the fact that the author just made it open source and suspended development is a tad ironic, I still have to say something about it.
- Only 196-700KB in memory
- Use gestures in any browser, or even any other program
- Draw your own gestures
- Support for Synaptics Touchpads (gestures with 1 finger (tap & hold), or 2/3 fingers)
- LUA scripting, so basically anything is possible with your gestures
- Also supports creating global hotkeys, although not application-specific, like the mouse gestures, but there's a way around that:
- Use other buttons than the right mouse click to initialize a mouse gesture (stroke button can be right/middle/left/X1/X2/Control/Alt)
- Ignore key to ignore a mouse gesture while pressed (I found Shift has the least compatibility problems)
- Global LUA scripts to run before/after every mouse gesture. One is particularly handy:
Well there you go. Just be sure to quickly go through the manual before you think it's not so easy after all. All will become clear.