Open Source

R

Within R I collaborate with developers in several packages, as well as participating in their respective online forums

• lavaan: is developed to provide useRs, researchers and teachers a free open-source, but commercial-quality package for latent variable modeling. You can use lavaan to estimate a large variety of multivariate statistical models, including path analysis, confirmatory factor analysis, structural equation modeling and growth curve models.
• blavaan: is a free, open source R package for Bayesian latent variable analysis. It relies on JAGS and Stan to estimate models via MCMC. Building on top of lavaan functionality for Bayesian models.
• semTools: Provides tools for structural equation modeling, many of which extend the lavaan package
• tidySEM: provides a ‘tidy’ workflow for conducting, reporting, and plotting structural equation modeling analyses. It does not perform model estimation, but instead allows users to estimate models in a software-agnostic way, using either the free open source R packages lavaan or OpenMx, or the commercial closed-source program Mplus.

Stan

Among the variety of general Bayesian software, I mostly work with Stan, to develop and test models such as SEM, IRT, and LCA. As well as being an active member in their open forum.