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...
Mockery : Mockery is a simple yet flexible PHP mock object framework for use in unit testing with PHPUnit, PHPSpec or any other testing framework. Its core goal...
Fluid Framework : Fluid Framework is a collection of client libraries for building distributed, real-time collaborative web applications. These libraries allow multiple...
vfsStream : vfsStream is a stream wrapper for a virtual file system that may be helpful in unit tests to mock the real file system. It can be used with any unit t...
ReactPHP : Event-driven, non-blocking I/O with PHP.
React is a low-level library for event-driven programming in PHP. At its core is an event loop, on top of whi...
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.