Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Personio is the all-in-one HR software for small- and medium-sized companies with 10 to 2000 employees.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.