Apache is a free and open-source cross-platform web server software.
Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
PHP is a general-purpose scripting language used for web development.
Sulu is the go-to CMS for back-end projects written within the PHP Symfony framework.
Unix is a family of multitasking, multiuser computer operating systems.