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.
Redom
Tiny (2 KB) turboboosted JavaScript library for creating user interfaces.
Canjs
Can do JS, better, faster, easier.
Bounce.js
Create beautiful CSS3 powered animations in no time.
Prototype
Prototype JavaScript framework
Remodal
Flat, responsive, lightweight, easy customizable modal window jquery plugin with declarative state notation and hash tracking.
Spine
Lightweight MVC library for building JavaScript applications
Snabbt.js
Fast animations with javascript and CSS transforms
Markdown to Jsx
🏭 The most lightweight, customizable React markdown component.
Vide
Easy as hell jQuery plugin for video backgrounds.
jQuery Migrate
APIs and features removed from jQuery core
Clndr
a jQuery calendar plugin that uses HTML templates
Claygl
A WebGL graphic library for building scalable Web3D applications
Alertify.js
JavaScript Alert/Notification System