Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.
Lottie by Airbnb - Easily add high-quality animation to any native app
Unused CSS - Easily find and remove unused CSS rules
Marionette Studio - Marionette Studio is an online animation software for beginners and professionals. Animate 2D characters and environments in minutes with no prior skills.
bttn.css - Awesome buttons for awesome projects!
Spirit - The animation tool for the web.