NLP常用开源/免费工具（转载于水木NLP版）

*Computational Linguistics Toolbox
  CLT http://complingone.georgetown.edu/~linguist/compling.html
  GATE http://gate.ac.uk/
  Natural Language Toolkit(NLTK) http://nltk.org
  MALLET http://mallet.cs.umass.edu/index.php/Main_Page
*English Stemmer
  Snowball http://snowball.tartarus.org/

*English POS Tagger
  Stanford POS Tagger http://nlp.stanford.edu/software/tagger.shtml
  TreeTagger http://www.ims.uni-stuttgart.de/projekte/corplex/TreeTagger/

*English Parser
  Stanford Parser http://nlp.stanford.edu/software/lex-parser.shtml
  Berkeley Parser http://nlp.cs.berkeley.edu/Main.html#Parsing

*English Keyphrase Extractor
  KEA http://www.nzdl.org/Kea/index_old.html
*English Name Entity Recognizer
  Stanford NER http://nlp.stanford.edu/software/CRF-NER.shtml

*Chinese Word Segmentator
  中科院ICTCLAS http://www.nlp.org.cn/project/project.php?proj_id=6
  Stanford Word Segmenter http://nlp.stanford.edu/software/segmenter.shtml

*Topic Modeling Tools
  Matlab http://psiexp.ss.uci.edu/research/programs_data/toolbox.htm

*Machine Learning Methods
  CRF++  http://crfpp.sourceforge.net/
  LIBSVM http://www.csie.ntu.edu.tw/~cjlin/libsvm/

*Search Engines
  Lucene http://lucene.apache.org/
  中科院FirteX http://www.firtex.org/

*Data Mining Toolbox
  Weka http://www.cs.waikato.ac.nz/ml/weka/

 

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