Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Gravatar is a service for providing globally unique avatars.
hCaptcha is an anti-bot solution that protects user privacy and rewards websites.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Snowplow is an open-source behavioral data management platform for businesses.
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.
WP Fastest Cache is one of a number of plugins for WordPress designed to accelerate the performance of your website.