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

PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.

Chart.js is an open-source JavaScript library that allows you to draw different types of charts by using the HTML5 canvas element.

Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.

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.

Cloudflare Browser Insights is a tool that measures the performance of websites from the perspective of users.

Popper is a positioning engine, its purpose is to calculate the position of an element to make it possible to position it near a given reference element.

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