Automatic Mapping Among Lexico-Grammatical Annotation Models (AMALGAM) is a free, longstanding tool for tagging text according to part of speech (PoS) from Leeds University. It includes eight PoS tag schemes, and a Multi-Tagged Corpus of samples tagged with various schemas.

TnT, which is short for Trigrams'n'Tags, is a statistical part-of-speech tagger from Universitat de Saarlandes. It can be trained on a variety of corpora and languages, and is based on the Viterbi algorithm for second order Markov models. It includes language models for English and German. This program is only available on request.

TATOO (ISSCO Tagger Tool) is a free, trainable text part-of-speech tagger based on hidden Markov models offered by the ISSCO in Geneva. It was developed in the 1990s and is still available for download.

IITagger was a part of speech tagging system developed in the 1990s to assign part of speech information to words from the Wall Street Journal.

WinBrill is a part-of-speech tagger developed by Eric Brill in the 1990s for the French language laboratory ATILF. It was originally available for UNIX, with WinBrill optimized for Windows 95/98/NT as of 1999. The ATILP provided a vocabulary and rules files based on FRANTEXT data. Versions of the Brill tagger are still extant online.

WordWanderer is a free, web-based tool for visualizing and exploring text. It combines search, concordance and word cloud attributes to enable users to explore their texts. Users can paste their own texts into the box provided, or choose from a list of preloaded texts. It includes the ability to include or hide words based on parts of speech, a stop list or a user-provided list, and can display the text based on relative frequency, context or comparison. To view specific words, users can search them or click on them in the visualization.