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/