The Symfony PHP framework

Doctrine Object Relational Mapper (ORM)

Event-driven, non-blocking I/O with PHP.

A flexible and feature-complete Redis client for PHP.

ThinkUp gives you insights into your social networking activity on Twitter, Facebook, Instagram, and beyond.

Vanilla is a powerfully simple discussion forum you can easily customize to make as unique as your community.

XHProf is a function-level hierarchical profiler for PHP and has a simple HTML based user interface.

ORM layer that creates models, config and database on the fly

PHP port of Underscore.js

The source code and content of Open.GL.

PHP StackOverflow Clone

PHP port of delayed_job, a database backed asynchronous priority queue

Lisp to PHP Compiler

An object-oriented PHP interface to the Twitter API

A PEAR package for SimpleGeo's API

Combine stylesheets and javascripts files, with no computation at runtime