I don't imagine this will be of much interest to most (if any) of you, but here's the source to my fleet combat simulator written in the statistical programming language R.

simulateCombat.R
example.R
(These are text files.)

More information about R:
R-project home
R documentation

R is an open-source language based on S-Plus (and Scheme to a lesser extent). Users familiar with languages like S-Plus, Matlab or Python will recognize most of the semantics. It has a fairly low learning curve (I picked it up while writing this project). Note that to use the simulator, you're going to have to be willing to get your hands a little dirty. It's not a stand-alone program, but rather an R script that defines a function simulateCombat, and is intended to be used interactively in the R environment. Some programming knowledge (or a lot of determination) is going to be necessary for this to be of much use to you; the other side of this coin is that it is much more flexible and allows more powerful analysis than the other available simulators (Darth Kryo's and the Java simulator [author?]).

Reply here if you have any questions. (I don't expect I'll be inundated with interest, heh).