AddToAny is a universal sharing platform that can be integrated into a website by use of a web widget or plugin.
Apache is a free and open-source cross-platform web server software.
Drupal is a free and open-source web content management framework.
Elfsight is an all-in-one platform offering 70+ customisable widgets for websites.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Typekit is an online service which offers a subscription library of fonts.