Ajax GUI Framework

A sexy server logger console in Firebug

The flexible, fast, and secure template language for PHP

How To Fix 25+ Internet Explorer 6 Bugs

Online Regular Expression Testing Tool

a PHP Template Engine

Google App Engine lets you run web applications on Google's infrastructure. App Engine applications are easy to build, easy to maintain, and easy to scale as your traffic and data storage needs grow. With App Engine, there are no servers to maintain: You just upload your application, and it's ready to serve your users.

JS Bin is a tool for experimenting with web languages. In particular HTML, CSS and JavaScript, but JS Bin also supports other languages too (like Markdown, Jade and Sass).
JS Bin is ultimately a code sharing site.

Pipes is a powerful composition tool to aggregate, manipulate, and mashup content from around the web.

Web Based Ajax Development Tool

The native Windows binding for PHP

Stack Overflow is a question and answer site for professional and enthusiast programmers.