American Solar Energy Society
Nonprofit organization dedicated to increasing the use of solar energy, energy efficiency, and other sustainable technologies in the U.S.

Big Frog Mountain -
Information about alternative energy sources, distributors and contractors.

Cape Wind
America’s first offshore wind farm on Nantucket Sound.

Database of State Incentives for Renewable Energy
Information about financial incentives, as well as rules, regulations and policies around energy efficiency in all states and from federal government.

MassCEC
Provides financial assistance to individuals and business for heat pumps, solar hot water, and solar PV at their homes and facilities. MassCEC also serves as a clearinghouse and support center for the clean energy sector, making direct investments in new and existing companies, providing assistance to enable companies to access capital and other vital resources for growth, and promoting training programs to build a strong clean energy workforce that capitalizes on the job opportunities created by a vital new industry.

Northeast Wind Resource Center
The Northeast Wind Center provides a clearinghouse of academic articles about wind energy in the northeast; including focuses on health, environment, and financial impacts of renewable energy.

Rocky Mountain Institute
Information about energy efficiency by state.

U.S. Offshore Wind Collaborative
U.S. Offshore Wind Energy: A Path Forward - This report published in October 2009 calls for coordinated activities among government agencies, universities, and businesses to nurture and develop offshore wind power in the United States.