Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
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.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.