Project Wonderland is a 100% Java and open source toolkit for creating collaborative 3D virtual worlds. Within those worlds, users can communicate with high-fidelity, immersive audio, share live desktop applications and documents and conduct real business. Wonderland is completely extensible; developers and graphic artists can extend its functionality to create entire new worlds and new features in existing worlds.
"Alfresco reduces your ECM costs by up to 96% compared to proprietary systems like Documentum, Open Text and SharePoint. It's as simple to use as a shared drive or SharePoint and does not lock you in to a proprietary stack."