So what kind of software would you like to see that doesn't exist?
I have two that I'd buy
1) An ICM overlay display. This would need to work in real time and would be an overlay similar to PAHUD. It would show the ICM value of each persons chip stack in a SnG as well as how much the blinds + antes (before any action) are worth to hero.
2) Real time ICM calculator based on nash equilibrium. Similar to
Nash Calculator but not web based and in real time. I guess with this you wouldn't really need #1. But anyway, it would calculate the nash values for pushing and calling and overlay them on your screen. Although something like this would probably seriously ruin SnGs.