Louise is a free high res facial rig for Maya, Unreal and Unity with a complete set of 236 blendshapes
Louise – Facial Rig
Animate With Arran
Animate With Arran is a YouTube channel by Arran Baker who has recently started to post some great free videos around animation process, workflow tips and more.
Ystra – Astral Witch
Ystra – Astral Witch is a free Maya rig by Christoph Schoch based on the concept by Alexis Pflaum. Download it HERE
Animation Methods
Animation Methods is a website hosted by animator David Rodriquez and has links to hundreds of rigs, tools and tutorials.
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)
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.
Animator's Resource Kit 