Deck.js
Modern HTML Presentations
Cufon
Fast text replacement with canvas and VML - no Flash or images required.
Sugar
A Javascript library for working with native objects.
ZenPen
A minimal web based text editor for the modern man.
Ion.range Slider
jQuery only range slider
Redom
Tiny (2 KB) turboboosted JavaScript library for creating user interfaces.
Remodal
Flat, responsive, lightweight, easy customizable modal window jquery plugin with declarative state notation and hash tracking.
Prototype
Prototype JavaScript framework
Bounce.js
Create beautiful CSS3 powered animations in no time.
Canjs
Can do JS, better, faster, easier.
Spine
Lightweight MVC library for building JavaScript applications
Claygl
A WebGL graphic library for building scalable Web3D applications
Egjs Flicking
:carousel_horse: :recycle: Simple module to implement flicking carousel interaction
Clndr
a jQuery calendar plugin that uses HTML templates
Vide
Easy as hell jQuery plugin for video backgrounds.
jQuery Migrate
APIs and features removed from jQuery core