PsySH : A runtime developer console, interactive debugger and REPL for PHP. PsySH can be used as an interactive debugger, much like JavaScript's debugger sta...
atoum : A simple, modern and intuitive unit testing framework for PHP!
Mink : Mink is an open source acceptance test framework for web applications, written in PHP 5.3.
A tool for quickly profiling variables and resources used by PHP.
