Sysend.js
Web application synchronization between different tabs
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.
Walkway
An easy way to animate SVG elements.
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
Snabbt.js
Fast animations with javascript and CSS transforms
Motus
Animation library that mimics CSS keyframes when scrolling.
Bounce.js
Create beautiful CSS3 powered animations in no time.
jQuery.terminal
jQuery Terminal Emulator - JavaScript library for creating web-based terminals with custom commands
Anime
Javascript Animation Engine