Clobberin’ Time is a set of rules for fast superhero skirmishes.
super heroes
Golden Age Super Heroes In Paper
For an unusual game, you might try these paper models of Golden Age Superheroes.
Poundland Super Hero Rules
Poundland is the UK version of the US Dollar Store chains. They sell knock-off Lego superheroes and the Death Zap blog wrote a set of rules for them called Poundland Super Heroes.
Heroes Among Us Superhero Game
Heroes Among Us is a pay-what-you-want game for quick play superhero skirmishes.
Men and Supermen Super Hero Role Playing Game
The Men and Supermen Role Playing Game is designed to allow super powered characters to fight along side normal characters. In doing this the RPG takes on what I think is one of the most difficult of tasks — creating a common scale between units of disparate strength.