I am pretty new to mac, and was wondering if there were any good accelerometer apps. I am pretty sure I have seen some before, but can't seem to find any. I am thinking of things like, tapping the macbook to switch spaces. I'm sure I have seen that before. Also, any other useful, or fun apps would be great. Please let me know if I have dreamt these up, or let me know what they are called if they exist. With some links if possible. Thanks for the help in advance.