The Joystick-It: a milled aluminium mini-controller that suction-grips to any capacitive touchscreen. Not the first but certainly the dinkiest yoke of its kind.
The Fling – a mini-joystick made from conductive rubber – attaches to the touchscreen of an iPad, minimising the amount of actual screen-touching required to play touchscreen controlled games on a touchscreen device.
Touchscreen. The word has lost all meaning.