“Multiverse is the only company focused on delivering a complete, end-to-end solution for MMOG and virtual world development. (…) Download the SDK (software development kit) with the full platform, the sample game, the complete documentation, and the starter assets, all for free. Multiverse makes its money through revenue-sharing. So when you make money, we make money. Not before.”
We already talked about this company in The future of internet, the inter-virtual worlds.