FingerprintJS is a browser fingerprinting library that queries browser attributes and computes a hashed visitor identifier from them.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Kong is an open-source API gateway and platform that acts as middleware between compute clients and the API-centric applications.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.