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.
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
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.
The Animation Paper – Pre Release is now available. Currently in Alpha but check it out, download it and give feedback
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.
AnimChallenge is a Facebook group that features a monthly animation challenge as well as a dedication to learning within the animation community.