Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Firebase is a Google-backed application development software that enables developers to develop iOS, Android and Web apps.
ASP.NET is an open-source, server-side web-application framework designed for web development to produce dynamic web pages.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.