Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Etracker is a web optimisation solution.
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.
TYPO3 is a free and open-source Web content management system written in PHP.