Bayonne is supported from Savanna.gnu.org. Please visit there. Sourceforge is generally depreciated except for mailing lists, but updated releases will be posted here from time to time.
The VP7 WKP is a GTK program which simulates the decay of radioactive nuclei. The user can do decay/activity measurements on various pre- or user defined materials. It is also possible to study the effectivity of aluminium, paper and lead as shields. This