TextExt is a plugin for jQuery which is designed to provide functionality such as tag input and autocomplete.
TileMill is an application for making beautiful maps
sh (previously pbs) is a full-fledged subprocess interface for Python that allows you to call any program as if it were a function
The chromeless project is an experiment into making it possible to build a web browser using only web technologies, like HTML, JavaScript, and CSS.
A free, hosted, portable and open source photo sharing service. A photo application that lets you store your photos on Dropbox, Amazon S3 or in your garage.
Look up HTML5, CSS3, etc features, know if they are ready for use, and if so find out how you should use them – with polyfills, fallbacks or as they
Web based AJAX terminal emulator
This PHP library allows creating functional webdriver tests with PHP.
ECMAScript 5 compatibility table
Trimage is a cross-platform GUI and command-line interface to optimize image files via optipng, pngcrush, advpng and jpegoptim
A powerful Photoshop-like CSS gradient editor from ColorZilla.
Humanized Messages is a javascript-based system for non-model notifications, from an idea by Jef Raskin, as relayed by Aza Raskin and adapted for jQuery
stream.js is a tiny stand-alone Javascript library that unlocks a new data structure for you: streams.
It's a presentation framework based on the power of CSS3 transforms and transitions in modern browsers and inspired by the idea behind prezi.com
Clint is a python module filled with a set of awesome tools for developing commandline applications.
Free font directory
A compiler for the Mustache templating language
A collection of command-line tools for researchers in machine learning, data mining, and related fields. All of the functionality is also provided in a clean C++ class library. Demo apps are included to show how to use the class library.
Live interactive cross-browser testing
I call this system "Semantic Versioning." Under this scheme, version numbers and the way they change convey meaning about the underlying code and what has been modified from one version to the next.