cdnjs is a free distributed JS library delivery service.
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.
Prism is an extensible syntax highlighter.
Zoho PageSense is a conversion optimisation platform which combines the power of web analytics, A/B testing, and personalisation.