Trigraphy - Photo editing app that allows you to make mosaic/abstract looking art.
MVGEN - Make your own music videos with audio, gifs, and special effects
Live GIF - Convert live photos to GIF
Photomosh - Turn anything into a vaporwave
GIF Brewery by Gfycat - Create stunning GIFs from videos & screen recording for free
HearSeeParty - Combine Gifs with with music using tags