does anyone have a public available Bayesian network program that can be shared?
Some options are:
First just in case take a look at Machine Learning
Use RLink to get Bayesian Networks from R.
Bayesian Logical Data Analysis for the Physical Sciences - see "resources" sections and download Mathematica notebooks. The books is also listed by Wolfram.
Brow University's Learning Dynamical Systems
Sensitivity Analysis in Gaussian Bayesian Networks Using a Symbolic-Numerical Technique
Search the Internet.
Generations of Naive Bayesian Classifiers from Anton Antonov.