Apache is a free and open-source cross-platform web server software.
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.
Leadfeeder is a B2B visitor identification software that tracks and identifies companies that visit your website.
Linkedin Ads is a paid marketing tool that offers access to Linkedin social networks through various sponsored posts and other methods.
Open Graph is a protocol that is used to integrate any web page into the social graph.