Animista - Create beautiful CSS animations in your browser
Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.
Keyframes.app - A timeline editor for CSS animations
Epic Spinners - Easy to use css loading animations with vue.js integration
CSS Animation Cheat Sheet - Awesome CSS3 plugin for spiffy animations
Animate.css - Animate.css is a cross-browser library of CSS animations.