Giphy - Search all the gifs and make your own animated gif
PaintBerri - PaintBerri is a free art site that offers an awesome oekaki community.
GIFmaker - GIFmaker gives you the freedom and flexibility to create unique, professional GIFS that are on-brand, on your own!
okekai - A small community site where you can draw, animate, and chat through pictures all for free
GIPHY Says - Turn your words into animated GIFs!
Brush Ninja - Hand-drawn Animated Gif Creator