Open Free Mapping driven by community embeddable map.
http://www.openstreetmap.org/
Mapping · Maps
Get access to data on 27,941 websites that are OpenStreetMap Customers. We know of 14,522 live websites using OpenStreetMap and an additional 13,419 sites that used OpenStreetMap historically and 5,767 websites in the United States.
Get a list of 27,941 websites using OpenStreetMap which includes location information, hosting data, contact details, 14,522 currently live websites and an additional 73,171 domains that redirect to sites in this list. 13,419 sites that used this technology previously and 5,767 websites in the United States currently using OpenStreetMap.