Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.

YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.

LearnWorlds is a powerful yet lightweight, user-friendly, white-labeled cloud-based LMS ideal for versatile employee training.

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.

reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.

Moment.js is a free and open-source JavaScript library that removes the need to use the native JavaScript Date object directly.

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.

Query Migrate is a javascript library that allows you to preserve the compatibility of your jQuery code developed for versions of jQuery older than 1.9.

Google Analytics is a free web analytics service that tracks and reports website traffic.

cdnjs is a free distributed JS library delivery service.