PaintBerri - PaintBerri is a free art site that offers an awesome oekaki community.
ezgif.com - Ezgif.com is simple online gif maker and toolset for basic animated gif editing.
okekai - A small community site where you can draw, animate, and chat through pictures all for free
Instagiffer - Create GIFs from anything!
Brush Ninja - Hand-drawn Animated Gif Creator
Gifsicle - Gifsicle is a powerful, simple command line tool for creating, editing, and optimizing animated GIFs.