Can’t say we ever thought we’d be playing simulated first person shooters on our iPhones, though we have to admit that it does make sense what with the built-in gyroscope and all. Strap your iPhone to a XAPPR gun and start shooting down aliens or bugs in a [slightly more] realistic way. Trigger presses are registered and sent to the iPhone via an auxiliary cable into the headphone port, though you’ll need a XAPPR-enabled game to really use it.

Grab one at Amazon – $5