Velocity.js - Velocity is a JavaScipt animation engine.
Animista - Create beautiful CSS animations in your browser
GSAP - GSAP (GreenSock Animation Platform) is a suite of JavaScript tools for high-performance animations that work in all major browsers.
CSS Animation Cheat Sheet - Awesome CSS3 plugin for spiffy animations
Canva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
Keyframes.app - A timeline editor for CSS animations