Giving serious consideration to using HERO System, a generic table-top role-playing game… engine, I guess, as a writing tool for one of my ongoing stories. It's a very powerful toolkit for modeling characters' abilities, measuring relative power levels, and tracking combats, although I'll need to be careful not to be too strict with it. As you should playing a table-top RPG in general, really, but still, it's an easy pitfall.
