Xenki Viewer Browser Based Open Source Virtual Client
In the below video you get a look at the Xenki virtual world viewer. This is an opensource browser based client used to view OpenSim, Second Life, and RealXTend Virtual World. It uses microsoft techonology Silverlight and XAML/XBAP and network protocols from MXP and OpenMetaverse. Developers are welcome to join the project at http://xenkiviewer.com.
There are a ton of opensource viewers available out there and it is exciting to see this level of sophistication and the implications that it has for creating and viewing your own virtual worlds and MMORPG games. Check it out:

[...] Creating Official Registry It seems like only a short time ago that Linden Lab made the Second Life Viewer open source. Since then many developers have created viewers that violate the terms of service in the virtual [...]