SmallWorlds, beta 2008

See also media link

SmallWorlds is a 3D virtual world that runs inside your web browser. It enables you to build your own room, house, or even your own world, and fill it with a wide variety of items and fun activities. With your online friends and acquaintances, you can share experiences like playing games, watching YouTube videos, listening to your favourite band browsing through photo galleries, and so much more. [Source: link]