Apache is a free and open-source cross-platform web server software.
Craft CMS is a content management system for building bespoke websites.
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.
OpenSSL is a software library for applications that secure communications over computer networks against eavesdropping or need to identify the party at the other end.
SEOmatic facilitates modern SEO best practices & implementation for Craft CMS 3.
Typekit is an online service which offers a subscription library of fonts.