AlterNetRides: Free service nationwide that matches up commuters. Includes links to other resources.
Autostop: Connects people together in sharing car journeys. Worldwide.
Carpoolconnect.com: A commuters search engine. Enter a zip or postal code and find commuters in your area searching for you to share a ride.
CarPoolWorld: Matches commuters based on proximity to home and work. Worldwide.
CarSharing Network: A program where members have access to a local fleet of vehicles, but do not own the individual vehicles. Links to European and North American cities with car sharing programs, and related resources.
Compartir: Carpooling via a geographic search engine. Enter your requirements.
Drive2Day: Cost free carpooling service which offers carpools world wide. Search for drivers or passengers.
eRideShare: Ride sharing and carpool board. Travel and commuting databases arranged by country and state.
Freewheelers: Lift sharing database connects drivers and passengers to share the cost of travel to work, festivals, gigs and sporting events.
Lift Share: The online journey matching service that finds you travelling companions.
Rideseek: Find drivers, riders and mates for free or cheap travel worldwide.