Netica is a complete program for working with belief networks and influence diagrams. Feature compiles belief (Bayesian) networks into a junction tree of cliques for fast probabilistic reasoning. http://www.norsys.com/netica.html
GeNIe is a development environment for building graphical decision-theoretic models running under Windows operating systems. SMILE is its portable inference engine, consisting of a library of C++ classes, currently compiled for Windows, Solaris and Linux. http://www2.sis.pitt.edu/~genie/
System based on Jie Cheng's three-phase belief network construction algorithm. Includes a wizard-like user interface and a belief network construction engine. http://www.cs.ualberta.ca/~jcheng/bnpc.htm
Able to learn Bayesian Belief Networks from (possibly incomplete) databases. Algorithm based on the Bound and Collapse estimation method. http://kmi.open.ac.uk/projects/bkd/
Tool for propagating uncertainty through local computations based on the general framework of valuation systems proposed by Shenoy and Shafer. http://iridia.ulb.ac.be/pulcinella/Welcome.html
Builds and licenses diagnostic software based upon Bayesian Belief Networks for medical, industrial and management applications. Software includes editors/compilers, test/review tools and inference engines embeddable in stand-alone and web-based applicati http://www.kic.com
Open-source suite of software tools for research and development using graphical models of probability, published by Kansas State University Laboratory for Knowledge Discovery in Databases (KDD) http://bnj.sourceforge.net