Better Touch Tool also has that functionality: http://boastr.de/ http://boastr.de/ I primarily use it to map three finger click to middle mouse button, but whe

Better Touch Tool also has that functionality: http://boastr.de/ http://boastr.de/ I primarily use it to map three finger click to middle mouse button, but when I discovered it also had the window-sizing-by-dragging-to-the-edge feature I turned it on and have been very happy with it..