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.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Prism is an extensible syntax highlighter.
Varnish is a reverse caching proxy.