Skystream 3.7 is a breakthrough in a new generation of RPAs (Residential Power Appliances) that is changing the energy landscape of how homes and small businesses receive electricity.
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Raum Energy Inc. provides the complete wind energy system - turbine, tower, grid-tie inverter or battery charger. The turbines are designed from the ground up to supplement grid electricity and have the lowest payback period of all grid-tie turbines in their class.
Raum Energy believes helping the environment by replacing dirty grid power with clean, free wind energy can be economical and affordable too!
http://www.bergey.com/
New 10 year warranty, & more powerful & efficient on the 10 kW BWC Excel! Bergey Windpower is one of the world’s leading suppliers of small wind turbines. With 30 years experience, installations in all 50 U.S. States and more than 100 countries. At Bergey Windpower, we take pride in offering advanced-technology products that let homeowners and businesses generate their own clean power and even spin their utility meter backwards. Our turbines are also used for off-grid homes, for rural electrification, and to boost the performance of solar electric systems.
Proven Energy Ltd. 
http://www.provenenergy.co.uk/
Proven products range from 2.5 kW to 15 kW rate capacity and are "grid connected" to your utility company's network. These high
performance robust turbines are engineered to operate in the most extreme wind conditions and provides a sustainable energy solution.
In winds of above 25 mph, the Proven Flexible Blade System enables the wind turbine to continue generating power at higher wind speeds.
This unique way of dealing with high winds not only protects the unit, but allows it to produce power in the most extreme winds.
When your wind turbine produces, it sends extra energy back into the power grid — your electric meter will actually run backwards!