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

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

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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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Designing Digitally is a development firm that specializes in virtual worlds, e-learning, and 3D training simulations.

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US $150 per month for a four-region simulator on the Starlight grid. Building, consulting, and Second Life migration services also available.