Apache is a free and open-source cross-platform web server software.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Matomo Analytics is a free and open-source web analytics application, that runs on a PHP/MySQL web-server.
Open Graph is a protocol that is used to integrate any web page into the social graph.
TYPO3 is a free and open-source Web content management system written in PHP.
Varnish is a reverse caching proxy.