Apache is a free and open-source cross-platform web server software.
Drupal is a free and open-source web content management framework.
Leaflet is the open-source JavaScript library for mobile-friendly interactive maps.
Modernizr is a JavaScript library that detects the features available in a user's browser.
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.
Typekit is an online service which offers a subscription library of fonts.
Unpkg is a content delivery network for everything on npm.