Morphology software for English

Software - Morphology and part of speech tagging

For languages other than English, see List of resources by language.

Morphology

Free software

• Catvar 2.0 - The Categorial Variation Database for English (OSL)
• Flemmv3.1 - inflectional morphology parser for French -- perl scripts, GPL license
• lttoolbox -- lexical processing tools for building morphological analysers/generators with XML specification files (GPL)
• MAP - Cambridge/Edinburgh Morphological Analyzer and Dictionary System (freeware)
• Morph-It! version 0.31 - a free morphological resource for the Italian language
• SFST - Stuttgart Finite State Transducer Tools (GPL)

Proprietary software

• CELEX database - Dutch, English, and German word forms
• FONOL - Phonological Programming Language (non-commercial only)
• German Morphology Browser
• Hebrew Morphological Parser
• MORLEX - A lexical database for French
• morpha and morphg - fast and robust morphological analysis and generation for English, from John A. Carroll (non-commercial only)
• MORFOGEN - a Morphology Grammar Builder and Dictionary Interface Tool
• NOMLEX - a dictionary of English nominalizations
• PC-KIMMO - a Two-level Processor for Morphological Analysis, including KGEN, KTEXT, and Englex
• TULIP - a two level phonological formalism
• Xerox/PARC - finite-state morphological analysis/generation using xfst, lexc, twolc

Part of speech tagging

Free software

• ACOPOST - A Collection Of PoS Taggers Maximum Entropy Tagger, Trigram Tagger, Transformation-based Tagger, Example-based tagger
• LBJ POS Tagger - Uses averaged perceptron based sequential model. Java API, Free, open source license.
• NLTK - Natural Language Toolkit Regexp Tagger, N-Gram Tagger, Brill Tagger, HMM Tagger, plus a freely downloadable book with a chapter on tagging
• RelEx - provides English-language part-of-speech tagging, entity tagging, as well as other types of tags (gender, date, money ...), after performing a deep parse, so that tags agree with parse. Also provides resulting stems. Apache 2.0 License.
• Spejd - Shallow Parsing and Disambiguation Engine a GPL tool for simultaneous rule-based morphosyntactic disambiguation and partial parsing
• Tagger training on the Apertium Wiki (HMM + constraint based)
• VISL Constraint Grammar rule based disambiguation (GPL)

Combined morphology and tagging

Free software

• XTAG - tools for parsing and grammar development, including morphological analysis and tagging, as described in XTAG System - A Wide Coverage Grammar for English and A Freely Available Wide Coverage Morphological Analyzer for English

Proprietary software

• Korean morphological analyzer and part-of-speech tagger
• NEUCSP - a tool for Chinese Word Segmentation and POS tagging