Any To GIF - Convert any picture into an animated GIF file.
Instagiffer - Create GIFs from anything!
Picasion - Great site for creating animated GIF files!
Gifsicle - Gifsicle is a powerful, simple command line tool for creating, editing, and optimizing animated GIFs.
Stacc - Tool for effectively converting videos to Gifs
ezgif.com - Ezgif.com is simple online gif maker and toolset for basic animated gif editing.