Fastly is a cloud computing services provider. Fastly's cloud platform provides a content delivery network, Internet security services, load balancing, and video & streaming services.
GitHub Pages is a static site hosting service.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
A CSS3 and jQuery Filter & Sort Plugin.
SmtpJS is a free library you can use for sending emails from JavaScript.
Unpkg is a content delivery network for everything on npm.
Varnish is a reverse caching proxy.