Apache is a free and open-source cross-platform web server software.
Backdrop is an open-source content management system (CMS) derived from Drupal 7, offering a user-friendly interface, customisable content types, taxonomies, views, theming capabilities, extensibility through modules, and regular security updates.
Drupal Multisite enables separate, independent sites to be served from a single codebase.
Typekit is an online service which offers a subscription library of fonts.