Snabbt.js
Fast animations with javascript and CSS transforms
Scroll Magic
The jQuery plugin for magical scroll interactions.
Dynamo.js
Creates dynamic bits of HTML to add some zest to your content
Ani X
Super easy and lightweight css animation library
Scroll Trigger
Triggers classes on html elements based on the scroll position. Uses requestAnimationFrame so it doesn't jack the users scroll.
Motio
Small JavaScript library for sprite based animations and panning.
Mojs
motion graphics library for the web
Motus
Animation library that mimics CSS keyframes when scrolling.
Count Up.js
Animates a numerical value by counting to it
Kute.js
KUTE.js is a native Javascript animation engine featuring badass performance, morphSVG, drawSVG, 2D and 3D transforms, SVG transforms, colors, as well as other CSS3 properties or presentation attributes.
Alice
AliceJS - (A Lightweight Independent CSS Engine) is a micro JavaScript library. For a demo, click the link below.
Smooth Scrollbar
Customizable, Pluginable, and High Performance Scrollbars!
Skrollr
Stand-alone parallax scrolling library for mobile (Android + iOS) and desktop. No jQuery. Just plain JavaScript (and some love).
Aos
Animate on scroll library
Gfx
CSS3 3D animation library
Rellax
Lightweight, vanilla javascript parallax library
Jmpress.js
A jQuery plugin to build a website on the infinite canvas