Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
Drupal is a free and open-source web content management framework.
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.
React is an open-source JavaScript library for building user interfaces or UI components.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.