jQuery CDN is a way to include jQuery in your website without actually downloading and keeping it your website's folder.
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.
Matomo Analytics is a free and open-source web analytics application, that runs on a PHP/MySQL web-server.
Modernizr is a JavaScript library that detects the features available in a user's browser.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Orbit is a jQuery slider.
PHP is a general-purpose scripting language used for web development.
Silverstripe CMS is a free and open source Content Management System and Framework for creating and maintaining websites and web applications.