Trigraphy - Photo editing app that allows you to make mosaic/abstract looking art.
GIF Maker - GIF Editor - GIF Maker by Kayak Studio is an easy way to create GIF from your video, multi images.
Live GIF - Convert live photos to GIF
GIF Brewery by Gfycat - Create stunning GIFs from videos & screen recording for free
DU GIF Maker - GIF Maker, Video to GIF & GIF Editor
WidsMob Montage - Make stunning mosaic photos or montage shape with tiles, which supports both JPEG and PNG files.