Phinx : Phinx makes it ridiculously easy to manage the database migrations for your PHP app. In less than 5 minutes you can install Phinx and create your firs...
Psalm : Psalm is a static analysis tool for finding errors in PHP applications.
atoum : A simple, modern and intuitive unit testing framework for PHP!
Hoppscotch : A free, online, open source API request builder
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).