NSFW cub-oriented oekaki. Underage characters, often in mature or sexual situations – much like the MUCK location.
Beginner to intermediate adult oekaki. Also hosts Coonaki, a less-mature site with a strong raccoon bias. See the archives for the better works.
Generic beginners' furry oekaki. Highly variable quality; some human content.
Furry and Digimon/Pokemon/video game characters. Registration required for access to adult work.