Apache is a free and open-source cross-platform web server 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.
LinkedIn Insight Tag is a lightweight JavaScript tag that powers conversion tracking, website audiences, and website demographics.
Open Graph is a protocol that is used to integrate any web page into the social graph.