- Open Bayes for Python is a free and open source Bayesian Network library.
- Software for Probabilistic Analysis, Storage, and Manipulation (SPASM) s a templatised C++ library for the storage and manipulation of a variety of probabilistic representations. Represenationtations currently considered are: Gaussian, Gaussian Mixtures, Parzen density Estimates, Particles and Discrete grids.
- Deal, (Learning Bayesian Networks in R) and gR (Graphical models in R) are GPL C++ packages for Bayesian networks
- PNL (Probabilistic Networks Library), is Intel's BSD software for Bayesian networks.
- The Bayes Net Toolbox for Matlab.
- The POMDP ( Partially Observable Markov Decision Process) solver software.