geoPlugin IP Geolocation CSV SDK provides indirect access to geoplugin.com. It is a website for the geoplugin.net API that allows users to lookup the location of an IP address or perform currency conversion. The web service provides free usage of its geolocation API and automatically supports IPv4/IPv6 queries. The API allows users to supply an IP address or latlon values, or if there is no input, the requesting IP address will be used. IP geolocation data returned includes country, region/state, city, zip code, latitude, longitude and more. Reverse geocoding can be performed by providing IP or lat/lon values to find nearby places, transport hubs etc in the "extras" category.
Yahoo has added to its suite of useful geographic tools with a brand new geocoder called PlaceFinder. This replaces Yahoo's old geocoding API and joins another 7 Yahoo mapping APIs in our directory for a total of 43 Yahoo APIs.