OpenStreetMap "OpenStreetMap is a free editable map of the whole world [...] OpenStreetMap allows you to view, edit and use geographical data in a collaborative way from anywhere on Earth..." By madelvicin Public bookmarkswith maps-and-mapping
OpenStreetMap Not perfect (my street in London isn't there) and slow to search but better than you might expect. I can't help thinking that to get the coverage it has it must rely heavily on appropriating commercial map data... By davidbrakein referencewith mapopensource