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.
Challenger Jacobus is a Youtube playlist made by Eric Jacobus where he performs movesets from beat-em-up games in real life. Great resource for animation reference!
AnimLvlUp is a facebook page hosted by animator, Jason Shum that has a bunch of great videos and interviews with industry veterans that share their stories of getting into the animation / games industry.
Darkstalkers – 12 Principles is an article that explains the 12 principles of animation through the pixel animation of Darkstalkers
Jonathan Abenhaim has an amazing YouTube channel that covers a load of tips, tricks and tutorials on animation. He posts regularly so make sure to subscribe!
Sakugabooru is a huge animation archive used by fans and animators alike to upload and view animation clips from anime movies and shows.
Orca Jobs List is an amazing website for finding jobs in game development and can be filtered to only display specific roles (like animation!)
SloMo Ref is a free collection of slow motion animal reference videos on Youtube