The Yahoo! GeoPlanet API contains about six million places, and YPlaces puts them all at your fingertips. The data is organized like a family, with brothers and sisters, kids and parents, and presented in the form of a tree.
Your Mashup not listed on ProgrammableWeb yet? Tell us about it and get listed.
Hardiness Zone Map
World Airport and Airspace Database
Python Code for Capitol Words API
Python Geocoding Aggregator
SpicyNodes & Google maps
Geocoding in CakePHP
Java for Google Maps Mashups
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.