Drupal

Drupal is an open-source content management system (CMS) that allows users to build and manage websites. While it doesn't directly offer a 'Distribution & Recommendation Engine' or 'Membership & Monetization' as a core feature like Medium, it provides the foundational tools for content creation, management, and community interaction. Its modular nature means many of the 'other' features can be added through contributed modules. The 'Rich Text Editor' is a standard component of any CMS for content authoring. 'Community Feedback Tools' are supported through comments and user interaction features. 'Publication Management' is inherent in its ability to manage various content types and editorial workflows. 'User Profiles & Following' and 'Tags & Topics' are fundamental CMS functionalities. 'Social Sharing & Embedding' is typically supported, and 'Search & Discovery' is a core function of a CMS.