Akeytsu is a piece of 3D animation software and is a lighter, faster and cheaper alternative to Maya. It also has a free educational version.
Akeytsu
Rocket Girl Rig (FREE)
Rocket Girl Rig is a free Maya rig from the VMComix animation blog.
Jasmine Rig (FREE)
Jasmine Rig is a free rig for Maya that has a load of great features!
Acting For Animators
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
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
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
Orca Jobs List is an amazing website for finding jobs in game development and can be filtered to only display specific roles (like animation!)
Animator's Resource Kit 