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...
Webhook Tester : Webhook Tester allows you to easily test webhooks and other types of HTTP requests.
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.