OpenStreetMap data is free for everyone to use. Their tile servers are not.
Please take a look at their "Tile Usage Policy":
http://wiki.openstreetmap.org/wiki/Tile_usage_policy
OpenStreetMap data is free for everyone to use. Their tile servers are not.
Please take a look at their "Tile Usage Policy":
http://wiki.openstreetmap.org/wiki/Tile_usage_policy