Freewheelers (Popularity: )
http://www.freewheelers.co.uk Lift sharing database connects drivers and passengers to share the cost of travel to work, festivals, gigs and sporting events.
drive2day (Popularity: )
http://www.drivetoday.de Cost free ride sharing service which offers rides world wide. Search for drivers or passengers.
CarSharing Network (Popularity: )
http://www.carsharing.net/ A program where members have access to a local fleet of vehicles, but do not own the individual vehicles. Links ...