Cyberworlds are information worlds or communities created on cyberspace by collaborating participants either intentionally or spontaneously. As information worlds, they accumulate information regardless whether or not anyone is in, and they can be with or without 2D or 3D visual graphics appearance. The examples of such cyberworlds are communities created in different social networking services, 3D shared virtual environments, and multiplayer online games. Cyberworlds are closely related to the real world and have a serious impact on it, augment and sometimes replace the real life and become a significant component of real economy. The international conferences on Cyberworlds have being organized annually since 2002 with the proceedings published by Conference Publishing Services (CPS) and special issues published in multiple journals, including The Visual Computer and Springer Transactions on Computational Science.