Open Source Social Network (OSSN) is an open source, self-hosted social networking platform. It allows users to create a social network for their own community or organization. It is written in PHP and is designed to be fast, secure, reliable, and extensible. It was designed with features that make it easy to create user profiles, connect and manage friends, post and comment on status updates, share photos and videos, message other users, and much more. OSSN also offers a wide range of themes and plugins to customize the look and feel of the site and to extend its functionality. It is an excellent choice for businesses, organizations, and individuals who want an easy-to-use and customizable social networking platform.
Discontinued has not been updated since 2015. Source: https://github.com/Libertree/libertree