CLAWS Tagger  
   From the UCREL corpus annotation project. Documentation, free online trial, licensing information.
   http://www.comp.lancs.ac.uk/computing/research/ucrel/claws/

TnT: Trigrams 'n Tags  
   Statistical part-of-speech tagger trainable on different languages and tagsets. Trained and trainable versions. Online demo, noncommercial licensing information, documentation.
   http://www.coli.uni-sb.de/~thorsten/tnt/

TreeTagger  
   A language independent part-of-speech tagger, available in versions adapted to German and to English. Documentation, downloads, license information, demos.
   http://www.ims.uni-stuttgart.de/projekte/corplex/TreeTagger/DecisionTreeTagger.html

General Data Tagger  
   Perl code in text format from Kristie Seymore. Brief notes.
   http://www-2.cs.cmu.edu/~kseymore/general_tagger.pl

AUTASYS - A Fully Automatic English Wordclass Analysis System  
   A Windows 95/98 compatible tagger developed by Alex Chengyu Fang. Tagsets, samples, documentation.
   http://www.phon.ucl.ac.uk/home/alex/project/tagging/tagging.htm

Monty Tagger: A Brill-Based Part-of-Speech Tagger  
   Portable tagger with implementations in Python and Java, based on Eric Brill's 1994 tagger. Background and license information, downloads.
   http://web.media.mit.edu/~hugo/montytagger/

Machinese Phase Tagger  
   Online demo of this constraint grammar-based tagger for English, French, Spanish, German, Dutch, Italian and Finnish,
   http://www.connexor.com/demos.html

Infogistics Parser/Chunker  
   Online demo of a system that tags and chunks English into phrases. Freely downloadable for research purposes.
   http://www.infogistics.com/posdemo.htm

Eric Brill's Home Page  
   Personal page of this computer scientist, including a download of the groundbreaking "Brill tagger." Source code from 1996, part Perl, part C.
   http://www.cs.jhu.edu/~brill/

Lingsoft's morphological analyzers  
   Two-level morphological analyzers for English, German, Swedish, Finnish, Danish, and both forms of Norwegian. On-line demos and licensing information.
   http://www.lingsoft.fi/demos.html

Memory-Based Tagger Demo  
   Online tagging of Dutch, Spanish, English, Slovene, Swedish and German text. Extensive list of related research.
   http://ilk.uvt.nl/~zavrel/tagtest.html