JavaScript 3D Library.

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

JSLint, The JavaScript Code Quality and Coverage Tool

Give your JS App some Backbone with Models, Views, Collections, and Events

An open source Flash™ runtime written in pure JavaScript

Plupload is JavaScript API for building file uploaders. It supports multiple file selection, file filtering, chunked upload, client side image downsizing and when necessary can fallback to alternat…

🌟 Raty - A Star Rating Plugin

The page flip effect for HTML5

An open source code editor for the web, written in JavaScript, HTML and CSS.

jQuery Mobile Framework

The original official jQuery Templates plugin. This project was maintained by the jQuery team as an official jQuery plugin. It is no longer in active development, and has been superseded by JsRender.

Asyncronous JavaScript loader and dependency manager

A jQuery plugin to create a dynamic, multi-column layout.

The definitive HTML5 mobile javascript framework

No longer maintained, superseded by JS Cookie:

jQuery Corner Plugin (by Dave Methvin and Mike Alsup)

Tired of adding prefix for each browser when it comes to the new css3 attributes?

jQuery Lint is a simple script you can download and use with jQuery. It works over the top of jQuery and diligently reports errors and any incorrect usage of jQuery.

JavaScript to test each CSS class on a page and report which are hindering performance

A simple, lightweight jQuery plugin for reading, writing and deleting cookies

A templating plugin for jQuery. BETA. NO LONGER IN ACTIVE DEVELOPMENT OR MAINTENANCE. Issues remain open but are not being worked.

Plupload is a JavaScript API for dealing with file uploads it supports features like multiple file selection, file type filtering, request chunking, client side image scaling and it uses different …

Research

Demo code for NodeJS

Personal HTML5, CSS3 demo code.

jQuery plugin to manage a list of checkboxes

a modern calendar widget

A collection of jQuery special events that provide more precision over normal DOM events.

Bookmarklet to load jQuery 1.3.2 in only 569 characters.