guzzle / guzzle

Guzzle, an extensible PHP HTTP client

thephpleague / commonmark

Highly-extensible PHP Markdown parser which fully supports the CommonMark and GFM specs.

flightphp / core

An extensible micro-framework for PHP

reduxframework / redux-framework

Redux is a simple, truly extensible options framework for WordPress themes and plugins!

Icinga / icingaweb2

A lightweight and extensible web interface to keep an eye on your environment. Analyse problems and act on them.

LibreBooking / librebooking

LibreBooking is an open-source resource scheduling solution. It provides a flexible, mobile-friendly, and extensible interface for organizations to manage resource reservations. The "develop" branch contains the latest code of the project.

tempestphp / highlight

Fast, extensible, server-side code highlighting for web and terminal