Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
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.
Font Awesome is a font and icon toolkit based on CSS and Less.
GitHub Pages is a static site hosting service.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Jekyll is a blog-aware, static site generator for personal, project, or organisation sites.
Mailchimp is a marketing automation platform and email marketing service.
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.
Varnish is a reverse caching proxy.