I've got two homebrew systems. The first one, which requires a calculator to play: Nocturne. The second one, a greatly streamlined version of the first: Twilight. Imaginative, huh? I call them 'tactical combat engines'. I don't think I should get more specific with the names because that would limit their apparent flexibility, and that would be a bad thing for the system - exactly the same mechanic is used for Emperor Palpatine as is used for Superman as is used for Archmage Pug. (I like my engine.)