Open Cobalt: Open Source Virtual World Browser and toolkit application
If u want free and open source virtual world browser and construction toolkit application then here is the Open Cobalt. It’s an open source virtual browser for accessing, creating, publishing, and hyperlinking avatar-based multi-user virtual worlds that you can access both on local area networks or across the Internet.
It is designed to enable the deployment of secure virtual world spaces that support education, research, and the activities of virtual organizations. The Open Cobalt application is a type of 3D browser that can be used to define and access a network of interlinked 3D virtual environments in much the same way that web browsers are used to define and access web based content on web pages. By leveraging OpenGL-based 3D graphics, Open Cobalt supports highly scalable collaborative data visualization, virtual learning and problem solving environments, 3D wikis, online gaming environments (MMORPGs), as well as privately and securely maintained multiuser virtual environments.
The Open Cobalt application leverages peer-based messaging to eliminate the need for virtual world servers/commercial services and makes it very simple for end-users to create and securely share deeply collaborative virtual worlds that run on all major software operating systems. Users moving through and interacting within Open Cobalt worlds simultaneously participate and collaborate in a dynamic, concurrent environment where they can work, explore, and learn at a level of integration and extensibility not easily achieved through commercial virtual world technologies. Without any licensing fees, users and developers can also freely build and share highly capable multi-user virtual workspaces, game-based learning and training environments, or even just create places to meet and interact with friends.