Google search with option to save any interesting results to a temporary folder, and the folder contents refine search terms, search re-runs. Handy way to discover new things or target what you really meant.
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flightwise (formerly fboweb.com)
Yahoo! Search API Tutorial
Gluestick PHP Wrapper for Glue
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.