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.
Glitch is a collaborative programming environment that lives in your browser and deploys code as you type.
Google Pay is a digital wallet platform and online payment system developed by Google to power in-app and tap-to-pay purchases on mobile devices, enabling users to make payments with Android phones, tablets or watches.
Unpkg is a content delivery network for everything on npm.
Varnish is a reverse caching proxy.