Cartrdge is a portfolio community for creatives working in video games and is great for creating a page and uploading animations in multiple formats such as Vimeo, Youtube, Gif.. etc
Thinking Animation has a great section on the pros and cons of different rigs. As well as a bunch of other resources and tips across the site.
Newgrounds is a popular website for posting animations, games and audio and has been around for over 20 years. Founded by Tom Fulp (also founder of The Behemoth [game developer])
Animators Resource is a similar website to this one but focuses more on specific posts and videos rather than linking to other websites.
Sketchfab allows you to upload full 3D scenes for others to view directly in their browser. They are the world’s largest platform to publish, share and discover 3D content online and in VR.
Living Lines Library is an amazing resource full of pencil tests, drawings, documentaries and more from the animation legends!
Animator Island is a treasure trove of animation secrets, techniques, tips, and information on your quest to become a Master Animator
On Animation is a website filled with animation analysis, behind the scenes, podcasts and more. Check it out!
Spungella is a blog run by Jean-Denis Haas that is constantly updated with inspiring animations, short films, progression reels and more. A great resource for inspiration!