Morphology software for English

Software - Morphology and part of speech tagging

Morphology

Catvar 2.0 - The Categorial Variation Database for English (OSL)
lttoolbox -- lexical processing tools for building morphological analysers/generators with XML specification files (GPL)
Morph-It! version 0.31 - a free morphological resource for the Italian language
SFST - Stuttgart Finite State Transducer Tools (GPL)

CELEX database - Dutch, English, and German word forms
Flemmv3.1 - inflectional morphology parser for French
FONOL - Phonological Programming Language (non-commercial only)
German Morphology Browser
Hebrew Morphological Parser
MAP - Cambridge/Edinburgh Morphological Analyzer and Dictionary System (freeware)
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

ACOPOST - A Collection Of PoS Taggers Maximum Entropy Tagger, Trigram Tagger, Transformation-based Tagger, Example-based tagger
Tagger training on the Apertium Wiki
NLTK - Natural Language Toolkit Regexp Tagger, N-Gram Tagger, Brill Tagger, HMM Tagger, plus a freely downloadable book with a chapter on tagging
Spejd - Shallow Parsing and Disambiguation Engine a GPL tool for simultaneous rule-based morphosyntactic disambiguation and partial parsing
VISL Constraint Grammar rule based disambiguation (GPL)