Energy transfer simulator
This page is a sort of energy transfer simulator tool thing. It randomly selects a particle, increments its energy level, selects a particle with energy level greater than 0 (which for the simulation may be the same particle), and decrements its energy level. This process is repeated several times. Specify the parameters, wait for the server to finish thinking, and admire the pretty graph.
A good input to use is 5,000 particles, initially on energy level 5, and to run for 5,000,000 steps. This should produce a roughly exponential output (which you can check by using a logarithmic scale).
If you want the code for the simulator, it's here. It outputs numbers in a form suitable for plotting with Gnuplot. The included "plot.gp" script is an example of what can be used to draw the graph. Be warned: there is no documentation of any sort.