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Yedda
Yedda (yedda.com) is a leading free Questions and Answer service. Yedda connects knowledge seekers with knowledge sources over the Web, by bringing together relevant individuals with mutual interests on any topic in a dynamic, open, collaborative environment - thus making personal experience and personal knowledge as acc...
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Yahoo! Answers
Yahoo! Answers leverages the power of the online community to help answer your questions. Developer APIs are available for you integrate Yahoo! Answers into your site.
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