Tombstone is a free RPG set in the wild west. It’s designed to be rules-light, and has quick play character creation to get you started.
Role Playing Games
City of Mist RPG Starter Set
You can get a free downloadable City of Mist RPG Starter Set. City of Mist has an interesting premise. It’s a noir type setting in which you play a character that is the incarnation of mythic and literary characters. You could be King Arthur, for example, or Little Red Riding Hood.
Dead Simple Steampunk RPG
Dead Simple Steampunk is a set of one-page RPG rules for settings in a Victorian science fiction setting. There’s also a one-page setting and one page for equipment.
CthulhuTech RPG Rules
For those who like to get in on the ground floor, Wildfire Games has an open Beta Test of its new CthulhuTech RPG Core Book.
Living Dead Zombie Rules
Living Dead is a set of free roleplaying rules for the zombie apocalypse.