Duo Games Duo Pinball
It's an extremely niche accessory, but pinball table fans will likely be happy to see Duo Pinball ($60) in the marketplace. The accessory serves only one purpose: controlling two pinball games currently available from the App Store on any generation of iPad. Duo Games' plastic sled has a spring-loaded plunger and a button on either side just like a real table. Bluetooth is used to connect to the iPad for control purposes. It runs on three included AA batteries and is certified by Apple.