Aketon is a set of one page (two sided) rulesbased on the classic proto RPG “Chainmail”
fantasy
Paper Dungeons and Starship Decks
Germ’s World has a two sets of paper corridors for use as terrain with your wargames: a set of dungeon corridors and a set for science fiction. The sets include wall sections of various lengths, crossroads, junctions, staircases, archways, pits, traps and more. They are easily as good as many of the commercially available sets. You could use these for any number of games, including Games Workshop’s Space Hulk or Warhammer Quest, WizKids’ MageKnight Dungeons, or just a regular Dungeons and Dragons slaughterfest.
SAGA Isengard Battleboard
A Saga battleboard and army list for the forces of Isengard from the Lord of the Rings.
Warmaster Paper Counters
A League of Ordinary Gamers has sets of paper counters for Warmaster armies including: New Kingdom Egyptians, Assyrians, Brettonian, Chaos, Dark Elves, Dwarf, Empire, High Elf, Lizardmen, Orcs, Skaven, Undead, Vampire Counts, and Wood Elves.
Paper counters are a good, quick and reasonably cheap way of trying out a system.
Mass Combat Rules For Role Playing Games
The Wrath of Zombies blog has a set of free RPG rules for Mass Combat. While written for the author’s own Thundarr style game, they are applicable to a wide variety of rules and settings.