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.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
TYPO3 is a free and open-source Web content management system written in PHP.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.