Apache is a free and open-source cross-platform web server software.
cdnjs is a free distributed JS library delivery service.
FreeBSD is a free and open-source Unix-like operating system.
Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
OpenSSL is a software library for applications that secure communications over computer networks against eavesdropping or need to identify the party at the other end.