Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
K-Sup is an open-source CMS/portal solution dedicated to higher education and research created by Kosmos Education.
Open Graph is a protocol that is used to integrate any web page into the social graph.