GeoPlanet

Yahoo GeoPlanet is a resource for managing all geo-permanent named places on Earth. The API provides an open, permanent, and intelligent infrastructure for geo-referencing data on the internet.

PlaceFinder

PlaceFinder is a geocoding Web service that helps developers make their applications location-aware by converting street addresses or place names into geographic coordinates (and vice versa).

Placemaker

Placemaker helps developers make their applications location-aware by identifying places mentioned in text, disambiguating them and returning unique identifiers (WOEIDs).

Yahoo Weather RSS Feed

The Weather RSS feed enables you to get up-to-date weather information for your location.