Sentiment Analysis (List of natural language processing toolkits)

Wikipedia: GATE | LingPipe | NLTK | R-Project | RapidMiner | Stanford NLP | UIMA | WEKA

Quora: What are the most powerful open source sentiment analysis tools?

Quora: Is sentiment analysis (based on data mining) the easiest way for "human-like" AI to proceed?

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GATE & Dialog Systems

LingPipe & Dialog Systems

NLTK & Dialog Systems

R Project & Dialog Systems

RapidMiner & Dialog Systems

Stanford NLP & Dialog Systems

UIMA & Dialog Systems

WEKA & Dialog Systems