Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Formidable Forms is a WordPress plugin that enables you to create quizzes, surveys, calculators, timesheets, multi-page application forms.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
PHP is a general-purpose scripting language used for web development.
SiteGround is a web hosting service.
Unpkg is a content delivery network for everything on npm.
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.