Trigraphy - Photo editing app that allows you to make mosaic/abstract looking art.
Photomosh - Turn anything into a vaporwave
Dreamscope - Make and share 'deep dream' images using dozens of supplied styles or your own.
HearSeeParty - Combine Gifs with with music using tags
Decim8 - Turn photographs into glitch art
Tumblr Music Video Generator - turn Tumblr accounts into music videos