DeviantArt - deviantART was created to entertain, inspire, and empower the artist in all of us.
PaintBerri - PaintBerri is a free art site that offers an awesome oekaki community.
Inkbunny - Helping furry artists and story-tellers share their work.
Brush Ninja - Hand-drawn Animated Gif Creator
Behance - The Creative Professional Platform.
okekai - A small community site where you can draw, animate, and chat through pictures all for free