In 2003 the Altered Learning concept was piloted at West Nottinghamshire College in an attempt to revolutionise the way that key skills were delivered. The aim was to find a method of engaging learners to not only participate, but also to achieve. The results have been nothing short of remarkable. http://www.alteredlearning.com/
With Forterra's OLIVE Platform, realistic virtual emergency departments, operating rooms, reception areas, and even entire health-care facilities can be built to support a wide range of training applications. http://www.forterrainc.com/
GarageGames mission is simple, we want to make great games. In fact, we think that anyone who wants to make great games should be able to do so. To that end, we have created the feature-rich, yet affordable Torque Technologies line of tools and resources for game developers of all experience levels. http://www.garagegames.com/
Game Maker allows you to make exciting computer games, without the need to write a single line of code.http://www.gamemaker.nl/
Project Wonderland is a 100% Java and open source toolkit for creating collaborative 3D virtual worlds. Within those worlds, users can communicate with high-fidelity, immersive audio, share live desktop applications and documents and conduct real business. https://lg3d-wonderland.dev.java.net/
Thinking Worlds™ is an incredibly versatile and globally unique educational games authoring engine. This game allows you to play, edit, create and even share games with other members of the Thinking Worlds™ community. Thinking Worlds is based on well researched and proven learning principles and has already been used to develop highly engaging games in many subject areas. http://www.thinkingworlds.com/
Virtual World list http://www.virtualworldsreview.com/info/categories.shtml