Velocity
Accelerated JavaScript animation.
Zenscroll
A JavaScript module to smooth-scroll web pages and other scrollable elements
Elevator.js
Finally, a "back to top" button that behaves like a real elevator.
Popmotion
A 12kb Javascript motion engine. Use for animation, physics and input tracking.
Shifty
A teeny tiny tweening engine in JavaScript. That's all it does.
Sysend.js
Web application synchronization between different tabs
Motus
Animation library that mimics CSS keyframes when scrolling.
Granim.js
Create fluid and interactive gradients animations with this small (< 10 kB) js library.
Dynamics.js
Javascript library to create physics-based CSS animations
Anime
Javascript Animation Engine
jQuery.terminal
jQuery Terminal Emulator - JavaScript library for creating web-based terminals with custom commands