Block Tech Super Heroes Hulk and Falcon Cap
However you categorize them, these two superheroes are different enough from LEGO minifigs to be considered mere cheap block toy figures, but they are still bootlegs due to their blatant yet unlicensed subject matter: The Incredible Hulk and Captain America.
This set was found at a Target I visited on an out of town trip. It was in their dollar section with a few other Block Tech minifigure two packs. The rest were pretty generic: soldiers and police and whatnot. This set was the only superhero set they had (and the only licensed character rip-off set for that matter.)
They're perfectly corny just like a good bootleg toy should be, so if you can find them they're worth the Washington you'll drop on them.