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.
Dana & David Rigs
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.
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
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
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 