I've developed a sort of 'core technology' that can be used to build out what can hopefully become another option in the social media arena. It's open source. It's supports a fully threaded 'tree' of content, rather than just a linear stream like Facebook and Twitter. You create SubNodes, rather than 'tweets' for example. Technology stack is Java, TypeScript, Google Polymer, Jackrabbit JCR, MongoDb, SpringBoot.

Demonstration site is: http://sbnode.com