Spirit - The animation tool for the web.
Spine - Spine is 2D animation software designed specifically for software and game development.
Lottie by Airbnb - Easily add high-quality animation to any native app
Synfig Studio - Just another WordPress site
Haiku Animator - Create powerful animations for any app or website
Live2D Cubism - Live2D is the world's first drawing technology to enable 3D rendering of 2D images.