Glitché - Turn images into pixelated, glitched-out works of art (iOS)
ezgif.com - Ezgif.com is simple online gif maker and toolset for basic animated gif editing.
Music Video Editor - Create, Edit and Share amazing music videos, Slideshows, and Stories with your photos and videos.
Gifsicle - Gifsicle is a powerful, simple command line tool for creating, editing, and optimizing animated GIFs.
Zalgo - An animated internet nostalgia trigger.
Instagiffer - Create GIFs from anything!