Inspired by the neo-dadaist collages of Robert Rauschenberg, Composite for iPad and Windows Phone allows you to remix your surroundings to create artistic compositions. Users are given the opportunity to paint pictures using the live video stream from their device’s front and back facing cameras. Simply point your iPad towards your subject and start painting to reveal it. A variety of control over the brush and video stream is offered to allow for a huge range of different aesthetics.
More info here