I'm also making my own game system that would suit my simulation tastes. You will see the preliminary notes on it in Gameinthebrain blog where It is beginning to look a bit detailed. I'm planning to talk to the programmers in our company to see how much it would cost to computerize the character creation system I'm proposing. Yep this thing is going to be freaking detailed, even more Detailed then Harn... but not as constricting. The basic principles of the system it to able to define it with current biometric tools and formulas available.
I've been also making a Wilderness Encounter Map generator using tables. Along with it comes a legend for tactical map drawing with white board markers over a tactical hex grid. I will also ask how much that will cost as software.
Sorry for my long absence. I've been consolidating my gaming under effort lately. Something that can apply to my other game systems. The Villa and the Manor creation will be very useful for my 19th Century Spanish-Colonial Philippines setting called Mahadlika. So will the maps and encounter generator. I've noticed realism and creating a way to make more realistic simulationist game tools applies to many real world genres (with some tweeking).
