A company that I deal with is slated to release a one of a kind golf tool in a few weeks. The Golf Vision app provides you with a real time preview of your putt and shows you exactly where to aim! If you've ever played Tiger Woods Golf it's like "Tiger Vision" but in real life. The app collects accelerometer data of the slope and computes the trajectories and angle of offset. http://www.igolfvision.com/
