Created by Henry Chu of pill & pillow, a Hong Kong design studio, Squiggle is an iPad application currently in development that allows you to draw lines on the screen which turn into stings and can be played like guitar. Keeping the device flat you can draw and modify existing one. Tilting the device will turn the screen black allowing you to play them. Turning the device over will clear the screen. See video below for demo.
Created with openFrameworks.