Power Technology
- A portal for the electrical power industry: international product and service catalogue, event calendar, associations directory, and related links.
- http://www.power-technology.com/

The Utility Connection
- Links to 4,000 electric, gas, water and wastewater utilities, utility associations, organizations, news, magazines, utility financial resources, and related state and federal regulatory and information sites.
- http://www.utilityconnection.com/

CleanEnergy
- Worldwide directory of renewable energy related companies, products, news, and events. Free companies registration. Many with web pages.
- http://www.cleanenergy.de/

Momentum Technologies LLC
- A comprehensive guide to more than 3000 renewable energy businesses and organizations. Find businesses by product type, business type, and location.
- http://energy.sourceguides.com/