Google Analytics is a free web analytics service that tracks and reports website traffic.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
TrackJS is an error monitoring agent for production web sites and applications.
Yaws (Yet Another Web Server) is an open-source web server designed to deliver dynamic content efficiently. It was developed by Claes (klacke) Wikström and is written in Erlang, a functional programming language.