Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Drupal is a free and open-source web content management framework.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Pantheon is a WebOps (Website Operations) and Management Platform for WordPress and Drupal.
Unpkg is a content delivery network for everything on npm.
Varnish is a reverse caching proxy.