Animate.css - Animate.css is a cross-browser library of CSS animations.
Animista - Create beautiful CSS animations in your browser
Hover.css - A collection of CSS3 powered hover effects to be applied to links, buttons, logos, etc.
Anime.js - Lightweight JavaScript animation library
GSAP - GSAP (GreenSock Animation Platform) is a suite of JavaScript tools for high-performance animations that work in all major browsers.
AniJS - A Library to Raise your Web Design without Coding.