This app is really fun...
"pxl allows you to create abstract compositions out of your own photos! choose between 9 different unique styles, pinch to change the image resolution or shake your device to randomly compile an image out of all possibilities available." http://kohlberger.net/apps/pxl
More here: http://www.fastcodesign.com/1669168/move-over-instagram-pxl-instantly-turns-y...