Apache is a free and open-source cross-platform web server software.
cdnjs is a free distributed JS library delivery service.
Debian is a Linux software which is a free open-source software.
Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
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.
Open Graph is a protocol that is used to integrate any web page into the social graph.