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Virtual reality design firm specializing in custom design and development for medical training games and simulations.

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3DLES offers project management, educational support, building and scripting for educational projects in OpenSim.

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KatiJack Studio is a virtual design firm specializing in landscaping and building which offers region terrains on its website.

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Virtual world development company working in Second Life and OpenSim.

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Jon Brouchoud designs virtual environments, 3D experiences and serious game applications in Unity3D, Second Life and OpenSim.

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ARCH Virtual provides resources and design services to clients using Second Life, OpenSim and Unity3D.

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Daden offers consulting, design and building services in virtual worlds, with particular expertise in the areas of web and real world integration, and creating interactive virtual personalities.

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Creative Twists Designs offers design, building and other services for companies considering Second Life and OpenSim deployments.