A PHP framework for web artisans.
The Symfony PHP framework
Open Source PHP Framework (originally from EllisLab)
Faker is a PHP library that generates fake data for you
Dependency Manager for PHP
Guzzle, an extensible PHP HTTP client
Yii 2: The Fast, Secure and Professional PHP Framework
The classic email sending library for PHP
The PHP Unit Testing framework.
High performance, full-stack PHP framework delivered as a C extension.
Better Markdown Parser in PHP
Mobile_Detect is a lightweight PHP class for detecting mobile devices (including tablets). It uses the User-Agent string combined with specific HTTP headers to detect the mobile environment.
CakePHP: The Rapid Development Framework for PHP - Official Repository
PHP errors for cool kids
Laravel Debugbar (Integrates PHP Debug Bar)