Express is a web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Typeform is a Spanish online software as a service (SaaS) company that specialises in online form building and online surveys.
Typekit is an online service which offers a subscription library of fonts.