Webhook Tester : Webhook Tester allows you to easily test webhooks and other types of HTTP requests.
FireLogger : A sexy server logger console in Firebug
PHP_CodeSniffer : PHP_CodeSniffer tokenises PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.
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...