cdnjs is a free distributed JS library delivery service.
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.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
Loadable-Components is a library to solve the React code-splitting client-side and server-side.
Open Graph is a protocol that is used to integrate any web page into the social graph.