Totally redesigned! Costwalk is a product search engine. Compare prices on products from multiple vendors. Get user reviews, detailed specs, store ratings and reviews and faceted searching.
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flightwise (formerly fboweb.com)
Google APIlity Library
Yahoo! Search API Tutorial
Shopping.com API Technical Documentation
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.