Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
nopCommerce is an open-source ecommerce solution based on Microsoft's ASP.NET Core framework and MS SQL Server 2012 (or higher) backend database.