Since 2005
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Listings
a natural language processing package.
http://www.brainhat.com/
natural language processing portal and community for linguists and programmers.
http://www.fieldmethods.net/
http://www.clsp.jhu.edu/
ThoughtTreasure is a free natural language processing/AI platform.
http://www.signiform.com/
explores real-life applications of speech recognition and text-to-speech technologies.
http://www.speechtek.com/