atoum : A simple, modern and intuitive unit testing framework for PHP!
Hoppscotch : A free, online, open source API request builder
PHP Insights : PHP Insights was carefully crafted to simplify the analysis of your code directly from your terminal, and is the perfect starting point to analyze the...
ApiGen : ApiGen is the tool for creating professional API documentation from PHP source code, similar to discontinued phpDocumentor/phpDoc.
The PHP Coding Standards Fixer : The PHP Coding Standards Fixer tool fixes most issues in your code when you want to follow the PHP coding standards as defined in the PSR-1 and PSR-2 ...
YOURLS stands for Your Own URL Shortener. It is a small set of PHP scripts that will allow you to run your own URL shortening service (a la TinyURL or bitly).