Continuing the convertion, I found this multitouch gesture recognizer (under
GNU GPL 2 license) called Touchegg: https://code.google.com/p/touchegg/ .
Looks promising!
It seems to have a second option for GUI:
https://github.com/Raffarti/Touchegg-gce
But it's under a CC Attribution 3.0 license. Not sure how (or if) the CC
licenses address freedom issues.
Let's test it!
P.S. This guy also has some configurations to change key bindings and adapt
them to the apple keyboard:
http://task3.cc/881/configure-the-keyboard-for-your-macbook-and-ubuntu-12-04/
