» Porter’s Stemmer

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Resource type:

NLP and IR Software

Description:

Algorithm to normalize English terms in Information Retruevak Systems. Available in several programming languages (ANSI C, Perl, Java, Python, PHP…). GPL License

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» SMART

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Resource type:

NLP and IR Software

Description:

Salton’s Magic Automatic Retriever of Text. Information Retrieval System which was conceived as a tool for evaluating the effectiveness of many types of analysis and search procedures. It incorporates three different methods of analysis of language: word, lemma and thesaurus.

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» TnT

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Resource type:

NLP and IR Software

Description:

Part of speech tagger for tasks of natural language processing. Optimized for speed and training in a wide variety of documents. Free License Agreement for nonprofit research.

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» TREC_EVAL

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Resource type:

NLP and IR Software

Description:

Text Retrieval Conference. Standard tool used by the TREC community to evaluate ad hoc retrieval runs, giving a result file and a standard set of known results.

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» Treetagger

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Resource type:

NLP and IR Software

Description:

Part of Speech Tagger. Executable for Sparc workstations, Linux and Windows PCs and Macs. Free distribution

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» Xerces-J

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Resource type:

NLP and IR Software

Description:

Parser working with XML in Apache Xerces family. It has a framework to build components for the parser and modular settings easy to program. Available under the Apache Software License.

Resource link:

» Zprise

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Resource type:

NLP and IR Software

Description:

Z39.50-1995 Prototype Indexing and Search Engines. Deals with documents and questions like lists of words and as response is given a list of documents ordered or ranked by their statistical similarity to the query. Supports for improving the question using relevance feedback. It is in the public domain, freely available

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