- CleanMPG.com Web forum dedicated to hybrid and non-hybrid hypermiling techniques and fuel efficient vehicles.
- MadisonHybridGroup.com Hybrid owner group in Madison, WI
- ChicagoPriusGroup Owners group for Prius and other hybrid owners in the Chicago area
- GreenDriveExpo.com Info about the upcoming hybrid car show in Madison, WI.
- InsightCentral.net News and knowledge for and by owners of the extremely fuel-efficient Honda Insight
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PriusChat.com
Forum for discussion regarding the popular Toyota Prius
- HybridCars.com News and Blogs about Hybrid vehicles, oil dependency, and the environment
- HybridCars.About.com Useful Information all About Hybrid Cars
- GreenCarCongress.com Energy, technology, issues and policies for Sustainable Mobility
- FuelEconomy.gov The Government's website about gas mileage and the 2010 Fuel Economy Guide
- HowStuffWorks.com How Hybrid Cars Work
- Automobiles.Honda.com American Honda Motor Company's website including the Insight and Civic hybrids.
- Toyota.com Toyota Motor Sales, USA's website including the Prius and Highlander Hybrids.
- Lexus.com The Lexus division's site about their entire hybrid lineup.
- Fordvehicles.com The Ford Motor Company's webpage about the Escape and Fusion Hybrids.
- LincolnMercury.com The Lincoln Mercury division's webpage about the Mercury Mariner Hybrid
- HybridCarStore.com Honda Motorwerks, La Crosse, WI. Large selection of certified preowned hybrid vehicles of all makes
- GreenHybrid.com The Interactive Online Resource, including the Real Hybrid Mileage Database