cdnjs is a free distributed JS library delivery service.
Drupal is a free and open-source web content management framework.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Keap offers an email marketing and sales platform for small businesses, including products to manage customers, customer relationship management, marketing, and ecommerce.
LiteSpeed is a high-scalability web server.
PHP is a general-purpose scripting language used for web development.