| CleanEnergy | | Worldwide directory of renewable energy related companies, products, news, and events. Free companies registration. Many with web pages. |
| Momentum Technologies LLC | | A comprehensive guide to more than 3000 renewable energy businesses and organizations. Find businesses by product type, business type, and location. |
| Power Technology | | A portal for the electrical power industry: international product and service catalogue, event calendar, associations directory, and related links. |
| 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. |
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