Apache is a free and open-source cross-platform web server software.
cdnjs is a free distributed JS library delivery service.
FreeBSD is a free and open-source Unix-like operating system.
Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.
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.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
Leaflet is the open-source JavaScript library for mobile-friendly interactive maps.
Mod_perl is an optional module for the Apache HTTP server. It embeds a Perl interpreter into the Apache server. In addition to allowing Apache modules to be written in the Perl programming language, it allows the Apache web server to be dynamically configured by Perl programs.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Perl is a family of two high-level, general-purpose, interpreted, dynamic programming languages.
Unpkg is a content delivery network for everything on npm.