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.
Here’s a set of cardboard figures designed for The Fantasy Trip, that classic, now sadly out-of-print role playing and miniatures game.
OneMonk has posted a free paper model of some standing stones and stone blocks that wold useful as a ruined city.
Grey Matter Games offers a free paper model of a science fiction dropship, suitable for games from 6mm – 28mm.
The League of Ordinary Gamer has a set of Gallic counters that you can use in lieu of miniatures of Gauls.