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
Frame by Frame
Frame by Frame provides educational breakdowns of animated and live action clips for animators looking to learn and non-animators who just can’t get enough of the artform
Sam & Amy Rigs
Sam & Amy Rigs are another great set of rigs made by Gabriel Salas
Henry Rig (Free)
Henry rig is a free rig made by students from Cogswell University
Dana & David Rigs
Dana & David are rigs made by Gabriel Salas to help balance the limited choice in terms of race that animators have when picking a character rig.
AnimProps
AnimProps is a website where 2D and 3D artists can create an account for free to share, sell or purchase artwork. A big resource for animation rigs.
Built By Colossus Rigs
Built By Colossus Rigs are free and paid Maya rigs available for download. Founded and run by Roman Jeffery.
Animation Paper – Pre Release
The Animation Paper – Pre Release is now available. Currently in Alpha but check it out, download it and give feedback
BOTW Link Rig
BOTW Link Rig is a free Maya rig based on the Breath Of The Wild version of Link (similar to the previously posted Zelda Rig). Made by Christoph Schoch.
Animator's Resource Kit 