Built By Colossus Rigs are free and paid Maya rigs available for download. Founded and run by Roman Jeffery.
Built By Colossus Rigs
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.
Agora Studio Rigs
Agora Studio have been creating a bunch of Maya rigs and releasing them for free primarily to be used in the AnimChallenge. Check them out HERE
51 Animation Exercises
51 Animation Exercises is a list of exercise ideas that can be used when you are unsure of what to animate. Whether you’ve animated a bouncing ball or not, this list will have something to keep your skills sharp. Compiled by Animator Island
BOTW Zelda Rig
BOTW Zelda Rig is a free Maya rig based on the Breath Of The Wild version of Zelda. Made by Christoph Schoch.
Zelda Rig
The Zelda Rig is a free Maya rig made by Christoph Schoch and is available on his Gumroad page
Link Rig
The Link Rig is a free Maya rig made by Christoph Schoch and is available on his Gumroad page
MocapX
MocapX is a Facial motion capture app for the iPhone that streams the mocap data to Maya in real-time
Grease Pencil Rigs
Grease Pencil Rigs are a free set of basic rigs for Blender 2.8 that are for use with Grease Pencil. They are aimed to ease the drawing of characters by showing construction lines which you can use for reference while drawing.
Animator's Resource Kit 