Guzzle, an extensible PHP HTTP client

The PHP Unit Testing framework.

Better Markdown Parser in PHP

Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS powered by PHP, Markdown, Twig, and Symfony

Slim is a PHP micro framework that helps you quickly write simple yet powerful web applications and APIs.

The Laravel Lumen Framework.

PHP library for the Stripe API.

Standards compliant HTML filter written in PHP

PHP Captcha library

A fluent builder Schema.org types and ld+json generator

Lavacharts is a graphing / charting library for PHP 5.4+ that wraps Google's Javascript Chart API.

Provide TeX-Hyphenation to PHP

Allow setting disk quota for an entire group