PRORA was a historically important set of six interrelated programs for creating computerized concordances, first released in the 1960s. It output on punched cards, could be used for any language represented by the Latin alphabet, and also had functions for generating word lists and annotating texts. Glickman and Staalman desgined PRORA to reduce the requirement for researchers to learn computers to use them in their literary studies.

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.