A directory of Twitter lists, listatlas shows you what's popular, fast-growing and new. You can also search by keyword and find Twitter lists.
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flightwise (formerly fboweb.com)
Beergeeks - Beer Finder
Yahoo! Search API Tutorial
RFacebook Ruby Gem
Cache Your Twitter Tweets in PHP
SWX Twitter API
Create a Twitter Mood Graph With Ruby
Update Twitter with Command Line Tools
Python Yahoo! Weather app for Twitter
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.