Louise is a free high res facial rig for Maya, Unreal and Unity with a complete set of 236 blendshapes
Ystra – Astral Witch
Ystra – Astral Witch is a free Maya rig by Christoph Schoch based on the concept by Alexis Pflaum. Download it HERE
League of Legends Rigs
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)
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.
Kit Rig (Free)
Kit Rig is a free rig for Maya. Available from the website animprops.com
Built By Colossus Rigs
Built By Colossus Rigs are free and paid Maya rigs available for download. Founded and run by Roman Jeffery.