Apache is a free and open-source cross-platform web server software.
Leaflet is the open-source JavaScript library for mobile-friendly interactive maps.
Mapbox.js is a JavaScript library provided by Mapbox for working with interactive maps and geospatial data.
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.
Unix is a family of multitasking, multiuser computer operating systems.
Unpkg is a content delivery network for everything on npm.