Design Principles - An open source repository of design principles and methods
Lottie by Airbnb - Easily add high-quality animation to any native app
UXmeter - Like Tinder, but for finding the hottest web design in town
Marionette Studio - Marionette Studio is an online animation software for beginners and professionals. Animate 2D characters and environments in minutes with no prior skills.
Checklist Design - The best UI and UX practices for production ready design.
Spirit - The animation tool for the web.