Aruba.it is an Italian company mainly active in the web hosting and domain registration businesses.
cdnjs is a free distributed JS library delivery service.
Clicky is web an analytics tool which helps you to get real-time analysis including spy view.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
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.
Unpkg is a content delivery network for everything on npm.