League of Legends Rigs have been released for the recent AnimChallenge contest. All rigs available for Maya (Agora). Braum and Annie are also available for Blender (RiggingDojo)
League of Legends Rigs
Riot Creative Contest 2017
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.
Animator's Resource Kit 