Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Express is a web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Google Analytics is a free web analytics service that tracks and reports website traffic.
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.
PayKickstart is an online shopping cart and affiliate management platform with built-in conversion enhancing features like one-click upsells for credit card/paypal, order bumps, custom checkout pages/widgets/embed forms, coupon management, auto-complete shipping fields, subscription saver sequences, and more.