Trigraphy - Photo editing app that allows you to make mosaic/abstract looking art.
CollageMo - Easily create beautiful real life wall collages
Tumblr Music Video Generator - turn Tumblr accounts into music videos
A Color Story - The photo app to colourize your life
Dreamscope - Make and share 'deep dream' images using dozens of supplied styles or your own.
Shrub - Draw with your camera.