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.
Popper is a positioning engine, its purpose is to calculate the position of an element to make it possible to position it near a given reference element.
ProvenExpert is a review based marketing platform that allows users to create customer surveys, provides aggregate reviews and ratings.
TYPO3 is a free and open-source Web content management system written in PHP.