PHPUnit : PHPUnit is the de-facto standard for unit testing in PHP projects. It provides both a framework that makes the writing of tests easy as well as the fu...
PHP unified diff patcher : A powerful class which allows to create and merge unified diff patches into any file. Fully written in PHP, uses the GNU standard unified diff format ...
Fluid Framework : Fluid Framework is a collection of client libraries for building distributed, real-time collaborative web applications. These libraries allow multiple...
TCPDF : TCPDF is a FLOSS PHP class for generating PDF documents.
Pimple : Pimple is a small Dependency Injection Container for PHP 5.3 that consists of just one file and one class (about 50 lines of code).
WebSockets for PHP
Ratchet is a loosely coupled PHP library providing developers with tools to create real time, bi-directional applications between clients and servers over WebSockets. This is not your Grandfather's Internet.