Trigraphy - Photo editing app that allows you to make mosaic/abstract looking art.
Kdan Mobile Animation Desk - Achieve your dream of creating your own animation.
Dreamscope - Make and share 'deep dream' images using dozens of supplied styles or your own.
Pixel Studio - The Pixel Art Is Always Fun
Photomosh - Turn anything into a vaporwave
PixelArtPaint pro - PixelArtPaint pro is a great pixel editor app that allows you to create and edit pixel art on your mobiles.