FlipaClip is an animation app for android and iOS that has a simple UI. Free and Paid versions can be downloaded from the Play Store and App Store.
FlipaClip
Johan The Dog
Johan The Dog is a free quadruped rig for Maya for use in non-commercial projects.
Advanced Skeleton
Advanced Skeleton has been used to rig creatures, props, vehicles and just about anything since 1999. It is free to download but if you want to use it for a commercial project you will have to buy a license.
Anim Streamers List
The Animation Streamers List was compiled by David J Pumpa and features a bunch of great animation streamers on Twitch.
Animation Exchange (2019)
Animation Exchange happened again! If you missed the live twitch stream you can catch up using the link above!
Grey Matter Gary
Grey Matter Gary is a free Maya rig from Squiggly Rigs
Keith Lango Tutorials
Keith Lango has released his collection of tutorials for free! These were originally made between 2005 & 2010 for paid subcribers only but are now available to everyone.
The Animates
The AniMates are a professional group of animators who get together every Sunday on Twitch to interview other animators, discuss animation topics and work on personal projects live! Their aim is to create a community of content to help both experienced and beginner animators! They also post everything to their Website
Jean-Denis Haas
Jean-Denis Haas is an Animation Supervisor at ILM and his Youtube channel covers animation tips for beginning animators, acting analysis, animation analysis and more!
Animator's Resource Kit 