Walk Score shows you a map of what is nearby and calculates a Walk Score for any property. Buying a house in a walkable neighborhood is good for your health and good for the environment.
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TreeHugger GRNDX Green Index
Using PHP with Carma API
SpicyNodes & Google maps
Java for Google Maps Mashups
Integrating Google Maps into Your Web Applications
Make your own Google map
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.