GettyImages has a massive selection of stock footage and is an amazing resource for reference material. Previews can be watched for free or you can pay for a higher quality version.
GettyImages (FREE+)
The Illusion of Life
The Illusion of Life by two of Disney’s ‘Nine Old Men’, Frank Thomas and Ollie Johnston is another must-have book. It is basically a bible of animation and explains everything about the history of animation, where the principles and techniques came from and more!
Animex Festival (UK)
Animex Festival is held at Teesside University and has been getting bigger and better for the past 18 years. It holds talks from the biggest and best talent in both the games and film industry. Highly Recommended if you live in the UK.
Extra Play
Extra Play focuses on analyzing video game animation and has over 40 videos that do just that! You can also follow Daniel Floyd on Twitter for more goodness.
Pinterest – Animation
Pinterest is a great place for animation inspiration and reference material. Whether you search for animation, dynamic poses or facial expressions you’ll always find something useful.
Animator’s Survival Kit
The Animator’s Survival Kit by Richard Williams is an essential book to own whether you’re a beginner or an expert.
Howard Wimshurst Tutorials
Howard Wimshurst has a youtube channel filled with some great animation techniques that apply across both 2D and 3D disciplines.
GDC Tricks of the Trade 2017
GDC Tricks of the Trade 2017 is another great talk full of industry veterans giving away free animation tips.
GDC Tricks of the Trade 2016
GDC Tricks of the Trade 2016 has some amazing tips from industry veterans. If you haven’t seen this already you need to watch it right now!
Animator's Resource Kit 