Goutte : Goutte is a screen scraping and web crawling library for PHP.
Goutte provides a nice API to crawl websites and extract data from the HTML/XML response...
Mink : Mink is an open source acceptance test framework for web applications, written in PHP 5.3.
atoum : A simple, modern and intuitive unit testing framework for PHP!
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...
PHP_CodeSniffer : PHP_CodeSniffer tokenises PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.
A tool for quickly profiling variables and resources used by PHP.