Lottie by Airbnb - Easily add high-quality animation to any native app
Anima App - Design, get feedback, convert to code, publish, iterate.
Marionette Studio - Marionette Studio is an online animation software for beginners and professionals. Animate 2D characters and environments in minutes with no prior skills.
Sketch Repo - Collection of resources for anyone who uses Sketch
Spirit - The animation tool for the web.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.