cdnjs is a free distributed JS library delivery service.
Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
A multi-dimensional charting library built to work natively with crossfilter and rendered using d3.js
Heroku is a cloud platform as a service (PaaS) supporting several programming languages.
Hoefler&Co is a digital type foundry (font design studio) in Woburn, Massachusetts (formerly New York City), founded by type designer Jonathan Hoefler. Hoefler&Co designs typefaces for clients and for retail on its website.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
Next.js is a React framework for developing single page Javascript applications.
Open Graph is a protocol that is used to integrate any web page into the social graph.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
Typekit is an online service which offers a subscription library of fonts.