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.
Unicode character recognition!
This is a tool to help you find Unicode characters. Finding a specific character whose name you don't know is cumbersome. On shapecatcher.com, all you need to know is the shape of the character!
How do I use it?
Draw your character as best you can in the "drawbox". You can do this by clicking and holding the left mouse button and moving around. Draw as many strokes as you need to, then click "Recognize" to start the recognition. If you want to clear the canvas and the results click on "Clear".
Goutte is a screen scraping and web crawling library for PHP.
Goutte provides a nice API to crawl websites and extract data from the HTML/XML responses.
Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface.
phpDocumentor enables you to generate documentation from your PHP source code. This documentation provides an in-depth view of your project to you, your consumers and contributors.