Turbines
Solar Turbines

Microturbines
Capstone
Ingersoll-Rand

Fuel cells
Fuel Cells 2000 (online information center)
FuelCell Energy
The Hydrogen and Fuel Cell Investor
National Fuel Cell Research Center
ONSI Corp. (subsidiary of International Fuel Cells)
Fuel Cell Today
UTC Fuel Cells

Solar electricity
American Solar Energy Society
Focus on Energy
National Center for Photovoltaics
MGE solar page

Stirling engines
American Stirling Co.
Sunpower, Inc.

Wind power
U.S. Department of Energy - energy efficiency and renewable energy
American Wind Energy Association
Bergey Windpower
Focus on Energy
GE Wind Energy
Nordex
VESTAS
Zilkha Renewable Energy

Wave power
U.S. Department of Energy - energy efficiency and renewable energy
Wave Dragon
Ocean Power Delivery LTD
Wavegen

Tidal Power
U.S. Department of Energy - energy efficiency and renewable energy
The Australian Renewable Energy Web Site
Annapolis Tidal Generating Station
Blue Energy Canada Inc.
Marine Current Turbines LTD

Ocean thermal energy conversion
U.S. Department of Energy - energy efficiency and renewable energy
The Australian Renewable Energy Web Site

Biomass
Focus on Energy
U.S. Department of Energy - energy efficiency and renewable energy
Community Power Corporation