ApiGen : ApiGen is the tool for creating professional API documentation from PHP source code, similar to discontinued phpDocumentor/phpDoc.
atoum : A simple, modern and intuitive unit testing framework for PHP!
Deployer : Deployer is a deployment tool written in PHP.
htty : htty is a console application for interacting with web servers. It’s a fun way to explore web APIs and to learn the ins and outs of HTTP.
asdf : Extendable version manager with support for Ruby, Node.js, Elixir, Erlang & more
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).