This GTK+ program simulates and visualizes the mathematical laws of radioactive decay. It was realized in the context of a final year project in my last school term. The composition (latex-source) is also avaible, but only in German language.
source (version 1.1.2), win32 (version 1.1.0)
There is also a git repository on github:
git clone https://github.com/weisslj/rdecay.git
Unix: Download source tar.gz-archive, extract it and build and install it with ./configure && make && make install. The libraries GTK+ 2.4 and GNU GSL are required.
Windows: Download the zip-archive and extract it to an arbitrary location on your hard disc (e.g. with a free program like 7-Zip). Then double-click "start.exe" in the newly created folder.
