Load scripts like images. Use HTML5 and CSS3 safely. Target CSS for different screens, paths, states and browsers. Make it the only script in your HEAD. A concise solution to universal issues.

A Conditional Loader For Your Polyfills!

OpenKeyval is a completely open key-value data store, exposed as a drop-dead simple web service. The goal is to make this a very easy way to persist data in web applications.

Aloha Editor is an open source WYSIWYG editor that can be used in webpages. Aloha Editor aims to be easy to use and fast in editing, and allows advanced inline editing.

hoverIntent is a plug-in that attempts to determine the user's intent... like a crystal ball, only with mouse movement! It is similar to jQuery's hover method. However, instead of calling the handlerIn function immediately, hoverIntent waits until the user's mouse slows down enough before making the call.

Virtually irrevocable persistent cookies

EnhanceJS is a new Javascript framework designed to improve the application of Progressive Enhancement by first testing browser capabilities for key Javascript and CSS support before applying advanced styles and scripts to the page.

Sammy is a tiny javascript framework built on top of jQuery, It's RESTful Evented Javascript.

jQuery Mobile is a HTML5-based user interface system designed to make responsive web sites and apps that are accessible on all smartphone, tablet and desktop devices

The HTML5 Shiv enables use of HTML5 sectioning elements in legacy Internet Explorer and provides basic HTML5 styling for Internet Explorer 6-9, Safari 4.x (and iPhone 3.x), and Firefox 3.x.

HTML Slides

DOM Storage Query Language (DomSQL) is an SQL inspired interface for DOM Storage (or Web Storage as defined in the W3C working draft).

make CSS3 Media Queries work in all browsers (JavaScript library)

Impel takes the pain out of working with HTML5 asynchronous databases.

Statement callbacks? Transaction callbacks? One-to-many and many-to-many relationships? How the heck do I deal with all without my head exploding?

A javascript library to hide differences between mapping APIs.

The modular lightweight JavaScript library, with CSS selectors, event handling, AJAX and complete Unicode support

Eloquent JavaScript is a book providing an introduction to the JavaScript programming language and programming in general.

Beautify, unpack or deobfuscate JavaScript and HTML, make JSON/JSONP readable, etc.