Leap 3D motion control system. It's 100 times more accurate than Kinect, will only cost $69.99
Kiss your mouse and keyboard goodbye - Control your computer with the Leap motion sensor.
Robohand is a 3D-printed hand for people who are missing fingers.
[VIDEO] The Ring Input Device Puts Gesture Control And Home Automation On Your Finger: Kickstarter; single unit pre-orders starting at $165, with a projected delivery date of July, 2014