Animista - Create beautiful CSS animations in your browser
CSS Animation Cheat Sheet - Awesome CSS3 plugin for spiffy animations
Keyframes.app - A timeline editor for CSS animations
AniCollection - The easiest way to find, use and share CSS3 animations.
Transformicons - Animated icons, symbols and buttons using SVG and CSS
Animate.css - Animate.css is a cross-browser library of CSS animations.