GeoPlugin (http://www.geoplugin.com) is a free-to-use IP-to-location geocoding service. However, they request users of their service to provide a link to their site using something like:
Geolocation by geoPlugin
| package | org.routamc.positioning |
|---|
arrayParameters to geocode with, conforms to XEP-0080arrayImplementation-specific configurationarraycontaining geocoded information