Dependency Injection

https://github.com/orno/di

http://framework.zend.com/manual/2.0/en/modules/zend.di.introduction.html

http://php-di.org/ (https://github.com/mnapoli/PHP-DI)

https://github.com/TomBZombie/Dice

https://github.com/auraphp/Aura.Di