Cufon
Fast text replacement with canvas and VML - no Flash or images required.
ZenPen
A minimal web based text editor for the modern man.
Sugar
A Javascript library for working with native objects.
Remodal
Flat, responsive, lightweight, easy customizable modal window jquery plugin with declarative state notation and hash tracking.
Canjs
Can do JS, better, faster, easier.
Bounce.js
Create beautiful CSS3 powered animations in no time.
Prototype
Prototype JavaScript framework
Redom
Tiny (2 KB) turboboosted JavaScript library for creating user interfaces.
Spine
Lightweight MVC library for building JavaScript applications
Snabbt.js
Fast animations with javascript and CSS transforms
Vide
Easy as hell jQuery plugin for video backgrounds.
jQuery Migrate
APIs and features removed from jQuery core
Alertify.js
JavaScript Alert/Notification System
Markdown to Jsx
🏭 The most lightweight, customizable React markdown component.
Clndr
a jQuery calendar plugin that uses HTML templates
Mavo
Create web applications entirely by writing HTML and CSS!