Ed Walker has written a set of free wargames rules called Tabletop Titans. He writes:
BAM – POW – KAZOWEE. These are the sounds of super heros in action. Who could forget the wild brawls we all envisioned while reading our favorite super hero comics? Tabletop Titans is a game of miniature combat where players create super heros to do battle. Designed to be played on any tabletop or with one of the many types of terrain systems on the market Tabletop Heros provides all the rules necessary to create a unique super hero and pit it in combat against other superpowered beings. Tabletop Titans uses the ACTION combat system.