Contao is an open source CMS that allows you to create websites and scalable web applications.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
Symfony is a PHP web application framework and a set of reusable PHP components/libraries.