I’ve been using Proton’s BattleSim
http://www.daak.de/hilfe/download/Proton BattleSim.zip
It’s got a nice interface, lets you alter how many calculations to run, and allows you to alter the OOL. Only thing is I don’t know how accurate it is.
I’ve noticed a couple of glitches with it though. If you do an amphibious assault with a BB shot, when you add the BB to the attacking forces, it adds 24 IPCs to your “IPC Spent”. Also, if the amphibious assault fails, then it includes the BB in your “Most Likely Loss of IPCs”. But you just have to remember to subtract 24 from that.
The other thing I noticed is that if you have 1 inf + 1 art attacking 1 inf, the attacker’s “Most Likely Loss of IPCs” is 0. However, if you have 2 inf + 1 art attacking 1 inf, the attacker’s MLLoI is 3. I’m not sure if this is a programming thing, or a statistical anomaly, but it doesn’t seem right to me.
Anyway, if anyone else uses it, I would be interested in their feedback.