Varnish is a reverse caching proxy.

Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.

Squarespace Commerce is an ecommerce platform designed to facilitate the creation of websites and online stores, with domain registration and web hosting included.

Squarespace provides Software-as-a-Service (SaaS) for website building and hosting, and allows users to use pre-built website templates.

Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.

Google Cloud Storage allows world-wide storage and retrieval of any amount of data at any time.

Google Cloud is a suite of cloud computing services.

Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.

jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.

JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.

A modest JavaScript framework for the HTML you already have.

Typekit is an online service which offers a subscription library of fonts.

Adobe Fonts is a web-based service providing access to a vast library of high-quality fonts for web and print design.

Font Awesome is a font and icon toolkit based on CSS and Less.

Cloud CDN uses Google's global edge network to serve content closer to users.