Overlay Scrollbars
A javascript scrollbar plugin which hides native scrollbars, provides custom styleable overlay scrollbars and keeps the native functionality and feeling.
Darkmode.js
🌓 Add a dark-mode / night-mode to your website in a few seconds
Cufon
Fast text replacement with canvas and VML - no Flash or images required.
Sugar
A Javascript library for working with native objects.
Bounce.js
Create beautiful CSS3 powered animations in no time.
Canjs
Can do JS, better, faster, easier.
Prototype
Prototype JavaScript framework
Spine
Lightweight MVC library for building JavaScript applications
Redom
Tiny (2 KB) turboboosted JavaScript library for creating user interfaces.
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
JS Plumb
jQuery/MooTools/YUI3 Javascript library that lets you connect parts of your UI together.
Clndr
a jQuery calendar plugin that uses HTML templates
Mavo
Create web applications entirely by writing HTML and CSS!