cdnjs is a free distributed JS library delivery service.
Contentful is an API-first content management platform to create, manage and publish content on any digital channel.
Materialize CSS is a front-end framework that helps developers create responsive and mobile-first web applications. It is based on Google's Material Design guidelines.
Next.js is a React framework for developing single page Javascript applications.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.