I Want to be an Animator is a Youtube collection of free Lessons, Tutorials and Tips about 3D Animation, mostly focusing on the basics and principles.
Darkstalkers – 12 Principles is an article that explains the 12 principles of animation through the pixel animation of Darkstalkers
Acting For Animators is an essential book for animators written by Ed Hooks and is the first book about acting theory that is written specifically for animators
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!
Orca Jobs List is an amazing website for finding jobs in game development and can be filtered to only display specific roles (like animation!)
Craft is a site that gathers high-quality material from films, graphic novels and other visual media and lets you explore how other professionals crafted it. Giving you access to source files from animators and artists. Free Trial is available.