FireLogger : A sexy server logger console in Firebug
atoum : A simple, modern and intuitive unit testing framework for PHP!
PHPMD - PHP Mess Detector : What PHPMD does is: It takes a given PHP source code base and look for several potential problems within that source. These problems can be things lik...
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...
A tool for quickly profiling variables and resources used by PHP.