NLP常用工具 from：http://www.cppblog.com/baby-fly/archive/2010/10/08/129003.html

各种工具包的有效利用可以使研究者事半功倍。

以下是NLP版版友们提供整理的NLP研究工具包。

同时欢迎大家提供更多更好用的工具包，造福国内的NLP研究。

*NLP 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

OpenNLP http://opennlp.sourceforge.net/

*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/

TnT http://www.coli.uni-saarland.de/~thorsten/tnt/

*English&Chinese 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

GibbsLDA++ http://gibbslda.sourceforge.net/

GLDA http://code.google.com/p/glda/

*Conditional Random Fields

FlexCRFs http://flexcrfs.sourceforge.net/ 含有MPI并行版本。

CRF++ http://crfpp.sourFceforge.net/

CRF Package http://crf.sourceforge.net/

CRF Matlab http://www.cs.ubc.ca/~murphyk/Software/CRFall.zip

CRFSuit http://www.chokkan.org/software/crfsuite/

SGD with CRF http://leon.bottou.org/projects/sgd

HCRF http://sourceforge.net/projects/hcrf/

*Support Vector Machine

LIBSVM http://www.csie.ntu.edu.tw/~cjlin/libsvm/

LIBLINEAR http://www.csie.ntu.edu.tw/~cjlin/liblinear/

Pegasos http://www.cs.huji.ac.il/~shais/code/index.html

*Search Engines

Lucene http://lucene.apache.org/

中科院FirteX http://www.firtex.org/

*Machine Learning and Data Mining Toolbox

Weka http://www.cs.waikato.ac.nz/ml/weka/