Irt
Information Resource Tracker (IRT) v.1.1.2
IRT was the once active port of IRM to Perl.
ResidPlots v.2.2.5.99
ResidPlots-2, is to provide a powerful tool for graphical residual analyses. ResidPlots-2 supports the most widely used IRT models including three dichotomous models (1PLM, 2PLM, 3PLM) and three polytomous models (GRM, GPCM, NRM).
Libirt v.1.1.5
Library of functions to estimate the items and abilities from the responses of subjects to a questionnaire.
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