https://tent.io/about

Basics

Tent is a communications protocol. It lets users store any kind of data and send that data to other users in real time. Just like other protocol-based services like email or the web, anyone can host their own server or write apps. Also like email, users can host their own Tent server or use a Tent hosting provider. Tent stores data as posts on each server. Posts are JSON and can contain binary attachments. Developers can create new types of posts for any kind of data and create Tent apps for everything from microblogging to cloud file sync.