OpenStreetMap
HTTP CORS ? OAuth
Navigation, geolocation and geographical data
API Endpoint
http://wiki.openstreetmap.org/wiki/APIMore Geocoding APIs
Geolocate website visitors from their IPs
HTTPS CORS apiKey
Actinia is an open source REST API for geographical data that uses GRASS GIS
HTTPS CORS ? apiKey
Get all administrative divisions of a country
HTTPS CORS Free