is an open standard for interoperable, decentralised, real-time communication over IP. It can be used to power Instant Messaging, VoIP/WebRTC signalling, Internet of Things communication - or anywhere you need a standard HTTP API for publishing and subscribing to data whilst tracking the conversation history.
See more at matrix.org
Our Riot-Web client is available at riot.pwoss.org.
We'll provide some 'PwOSS - Rooms' soon.