This patent-pending tactile joystick Fling, from TenOne Design, is a great way to have a physical interface on an otherwise button-free device. The Fling is made of a high-quality resin that is incredibly flexible and durable, as well as clear. This means that you can still see the action on the screen.
The Fling adheres to the iPad by a suction cup, so it’s easy to remove the accessory when not in use. This is a great item for people who predominately use their iPad as a gaming device. Some apps that work well with the Fling are: Battle Bears -1, Call of Duty Zombies HD, Geometry Wars, Sonic 2, and many others. $18.99