Google Analytics is a free web analytics service that tracks and reports website traffic.
Imperva is a cyber security software and services company for networking, data, and application security.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Silverstripe CMS is a free and open source Content Management System and Framework for creating and maintaining websites and web applications.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.