Zenscroll
A JavaScript module to smooth-scroll web pages and other scrollable elements
Flippant.js
A mini dependancy-less UI lib for flipping over DOM nodes.
Velocity
Accelerated JavaScript animation.
Elevator.js
Finally, a "back to top" button that behaves like a real elevator.
Shifty
A teeny tiny tweening engine in JavaScript. That's all it does.
Popmotion
A 12kb Javascript motion engine. Use for animation, physics and input tracking.
Sysend.js
Web application synchronization between different tabs
Motus
Animation library that mimics CSS keyframes when scrolling.
Dynamics.js
Javascript library to create physics-based CSS animations
jQuery.terminal
jQuery Terminal Emulator - JavaScript library for creating web-based terminals with custom commands
Anime
Javascript Animation Engine