Scroll Reveal.js
Declarative on-scroll reveal animations.
Effeckt.css
A Performant Transitions and Animations Library:
Anijs
Declarative handling library for CSS animations.
Velocity
Accelerated JavaScript animation.
Parallax
Parallax Engine that reacts to the orientation of a smart device
Slidr
add some slide effects.
Animo.js
A powerful little tool for managing CSS animations
Jmpress.js
A jQuery plugin to build a website on the infinite canvas
Flippant.js
A mini dependancy-less UI lib for flipping over DOM nodes.
Lazy Line Painter
A jQuery plugin for SVG path animation
Shifty
A teeny tiny tweening engine in JavaScript. That's all it does.
Lwf
LWF - Lightweight SWF
JS Movieclip
A javascript little framework to animate spritesheet as AS3 movieclip
Sly
JavaScript library for one-directional scrolling with item based navigation support.
Skrollr
Stand-alone parallax scrolling library for mobile (Android + iOS) and desktop. No jQuery. Just plain JavaScript (and some love).
Animate.css
Cross-browser CSS3 animations. Plug and play. Do a little dance.