The OpenSimulator Community Conference is an annual conference that focuses on the developer and user community creating the OpenSimulator software. Organized as a joint production by Core Developers of OpenSimulator and AvaCon, the virtual conference features presentations, workshops, keynote sessions, and social events across diverse sectors of the OpenSimulator user base.
More info at http://conference.opensimulator.org and to register, go to https://oscc17.eventbrite.com
OpenSimulator is an open source multi-platform, multi-user 3D application server. It can be used to create a virtual environment (or world) which can be accessed through a variety of clients, on multiple protocols. It also has an optional facility (the Hypergrid) to allow users to visit other OpenSimulator installations across the web from their 'home' OpenSimulator installation. In this way, it is the basis of a nascent distributed Metaverse.