Gleb Sabirzyanov reviewedBetterTouchToolFree OS X app to configure custom gestures for your trackpad
Amazingly simple to set up, can't imagine my life without it already! It saves so much time!
Makes life very hard when you don't have it.
I use it from 100 to 700 times per day according to built-in statistics.
Gleb Sabirzyanov has used this product for one year.