Location(s): United Kingdom, Denmark 

Turbine Types: Grid-connect, stand alone, wind/diesel, and other products

Gaia-Wind's Website

Location: Denmark and numerous U.S. offices
Turbine Sizes: 250 kW, 400 kW, 1.3 MW, 2.3 MW, and 3.6 MW

Siemens website 

Location: Germany
Turbine Sizes: 1.5 MW, 2.0 MW, 5.0 MW

REPower website 

Location: Toronto, Ontario, Canada

Turbine Sizes: 750 kW and 900 kW

Americas Website 

Location: Utah
Turbine size: 3.75 kW

Windward Engineering Website

Location: Minnesota
Turbine sizes: 10-17 kW and 20 kW

Wind Turbine Industries Website

Location: Oregon
Turbine size: 65 kW

Windmatic Website

Location: Arizona
Turbine size: 400 W, 900 W, 1 kW, and 1.8 kW

Southwest Windpower Website

Location: Many offices throughout the U.S. and Europe

Turbine size: .6 kW, 2.5 kW, 6 kW, and 15 kW

Proven Energy Website

Location: Many offices throughout the U.S.

Turbine size: 100 kW

Distributed Energy Systems Website