Apache is a free and open-source cross-platform web server software.
cdnjs is a free distributed JS library delivery service.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
OneTrust is a cloud-based data privacy management compliance platform.
Popper is a positioning engine, its purpose is to calculate the position of an element to make it possible to position it near a given reference element.