http://www.youtube.com/smartFoxServer
SmartFoxServer is a comprehensive platform for rapidly developing massive multi-user applications and games with Adobe Flash/Flex/Air, Java, Android, .Net, Unity3D, Silverlight, Apple iPhone etc…
It was developed with simplicity in mind, allowing developers to quickly create any type of multiplayer interactions, from basic
chat applications to complex real-time games and MMOs.
SmartFoxServer comes with a rich set of features, one of the best sets of documentations with many source examples, powerful administration tools and an active online support forum.
http://www.youtube.com/smartFoxServer