DeviantArt - deviantART was created to entertain, inspire, and empower the artist in all of us.
Synfig Studio - Just another WordPress site
Brush Ninja - Hand-drawn Animated Gif Creator
Creature - Creature 2D Skeletal and Mesh Animation Tool
pixiv - pixiv is an illustration community service where you can post and enjoy creative work. A large variety of work is uploaded, and user-organized contests are frequently held as well.
Live2D Cubism - Live2D is the world's first drawing technology to enable 3D rendering of 2D images.