https://www.openstreetmap.org It would be really cool to be able to be able to choose different basemaps, like openstreetmap, bing, google, mapbox. But I understand not all basemaps are free. OpenStreetMap is free, and it's quite good.
OpenID is service that allows you to log-on to many different websites using a single indentity. Find out more about OpenID and how to get an OpenID enabled account.