Riot Creative Contest 2017 is a competition by Riot Games and hosted by Polycount that artists, animators and other disciplines can enter. Expect killer prizes, amazing art, and stiff competition.
Tea Time Animation is a website and forum run by Lana Bachynski (Blizzard) that has a bunch of great advice and resources for animators.
Animstate Forum is filled with some amazing industry veterans and also has a lot of other resources across the rest of the website.
Polycount is a forum to showcase your work and recieve feedback, join in on animation challenges or just have a chat!
AnimState is.. HERE