Software for Flexible Bayesian Modeling and Markov Chain Sampling This software supports Bayesian regression and classification models based on neural networks and Gaussian processes, and Bayesian mixture models. It also supports a variety of Markov chain sampling methods, which may be applied to distributions specified by simple formulas, including simple Bayesian models defined by formulas for the prior and likelihood. Before trying to use the software, you may need to read various references that describe the models and the Markov chain methods used. Some of the programs in this package are designed for use with the xgraph plot package for X-Windows, though the data can instead be plotted by whatever plot program you have available.