Figmotion - Animation tooling right in Figma
Lottie by Airbnb - Easily add high-quality animation to any native app
Jitter - A simple animation tool on the web
Marionette Studio - Marionette Studio is an online animation software for beginners and professionals. Animate 2D characters and environments in minutes with no prior skills.
Principle - Principle makes it easy to create animated and interactive user interface designs.
Spirit - The animation tool for the web.