The Symfony PHP framework
Mockery is a simple yet flexible PHP mock object framework for use in unit testing with PHPUnit, PHPSpec or any other testing framework. Its core goal is to offer a test double framework with a succinct API capable of clearly defining all possible object operations and interactions using a human readable Domain Specific Language (DSL).
The FrameworkBundle defines the main framework configuration, from sessions and translations to forms, validation, routing and more.
Open Source Point of Sale is a web based point of sale application written in PHP using CodeIgniter framework. It uses MySQL as the data back end and has a Bootstrap 3 based user interface.
Barcode generator in PHP that is easy to use, non-bloated and framework independent.
Silly CLI micro-framework based on Symfony Console
Bolt is a simple CMS written in PHP. It is based on Silex and Symfony components, uses Twig and either SQLite, MySQL or PostgreSQL.
A really simple library to generate JSON Web Tokens in PHP.