Knight Models offers its Marvel Universe Rulebook free for the downloading.
Rules: Pulp
Crimson Eagles Pulp Air Combat Rules
Crimson Eagles is Michael Reitz’s mash-up between the old FASA Crimson Skies pulp aircraft rules and the Canvas Eagles WWI rules.
Valley Of The Apes Miniatures Adventure Game
Valley of the Apes is designed as an adventure game for kids. Players create their own jungle terrain, scatter the encounter tiles (with hazards or treasures) across the valley, and send bands of toy soldier figures to seek fame and riches.
TSR’s Warriors of Mars
In 1974, TSR published a set of rules for playing out battles set in Edgar Rice Burrough’s Barsoon.
Godlike Open Source Rules
Godlike – Open Source Rules is a conversion of the WWII Superhero RPG to the familiar d20 type system.