Apache is a free and open-source cross-platform web server software.
cdnjs is a free distributed JS library delivery service.
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.
Three.js is a cross-browser JavaScript library and application programming interface used to create and display animated 3D computer graphics in a web browser using WebGL.
Unpkg is a content delivery network for everything on npm.