Icons8 Background Remover - Quickly remove the background from any photo
ezgif.com - Ezgif.com is simple online gif maker and toolset for basic animated gif editing.
Trace by Sticker Mule - Remove the background from any image for free
Instagiffer - Create GIFs from anything!
IMG.LY - Power Your Apps with IMG.LY | The Leading Provider of Design, Photo, and Video Editing SDKs
Gifsicle - Gifsicle is a powerful, simple command line tool for creating, editing, and optimizing animated GIFs.