sirt

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Author: Alexander Robitzsch
Contact: https://cran.r-project.org/web/packages/sirt/
Description: Supplementary Item Response Theory models to complement existing functions in R, including multidimensional compensatory and noncompensatory IRT models, MCMC for hierarchical IRT models and testlet models, NOHARM, Rasch copula model, faceted and hierarchical rater models, ordinal IRT model (ISOP), DETECT statistic, local structural equation modeling (LSEM).
Analyses: Dimensionality; Factor/Latent Structure; Simulation/Resampling; SEM
System Requirements: Windows, Linux, or Mac
Measurement Model: IRT/Rasch
License Type: Open-Source (R)
Documentation: User manual in pdf

Software License
Open-Source (R)
Measurement Model
Item Response Theory; Rasch
Analysis
Dimensionality; Factor/Latent Structure; Simulation/Resampling