Dojo
Dojo saves you time and scales with your development process, using web standards as its platform. It’s the toolkit experienced developers turn to for building high quality desktop and mobile web applications.
Proton
A particle engine for html5
Baguette Box.js
Simple and easy to use lightbox script written in pure JavaScript
Typeit
The most versatile JavaScript typewriter effect library on the planet.
Grid
Drag and drop library for two-dimensional, resizable and responsive lists
JS Plumb
jQuery/MooTools/YUI3 Javascript library that lets you connect parts of your UI together.
Smoothie
Smoothie Charts: smooooooth JavaScript charts for realtime streaming data
Remote Storage
Client-side Javascript library to make apps compatible with a remote storage.
Shuffle
jQuery Shuffle Plugin
Swipebox
A touchable jQuery lightbox
Rainbow
Simple syntax highlighting library written in javascript
Twig.js
JS implementation of the Twig Templating Language
Responsive Slides
Simple & lightweight responsive slider plugin (in 1kb)
Keypress
A keyboard input capturing utility in which any key can be a modifier key.
Oimo.js
Lightweight 3d physics engine for javascript
Jquery Tokeninput
Tokeninput is a jQuery plugin which allows your users to select multiple items from a predefined list, using autocompletion as they type to find each item. You may have seen a similar type of text entry when filling in the recipients field sending messages on facebook.