Dread Roleplaying Game

Dread is a role playing game that uses an innovative mechanic — a Jenga game — to resolve actions and build tension.

There are both free and paid versions.

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.

Contagion Role Playing Game

Contagion is a role playing game of modern horror, in which the forces of Heaven and Hell are fighting for the souls of mankind.

Searchers of the Unknown Minimalist RPG Rules

Searchers of the Unknown is a set of free role playing rules. These are one-page, minimalist rules, each of which is designed as a stand-alone product. The collection includes: Searchers of the UnkownDwarven Glory (and supplement), Karry on Krawling, Witches of N’kai, Adventurers!, Cyborg Samurai Are Go!, Dirty Rotten Scoundrels, Funkin Fists of Fu, Jung Guns, Raiders of the Unknown, The Bastards, Brickmasters of the Unknown, Mutant Got Gunz, Mutant Scavengers of the Ruined Earth (and supplement), Tempora Mutantur (and supplements), Searchers in Spaaaace!!!, Scavengers & Spacewrecks, Swashbucklers of Mars (and a supplement), and Song of the Symbi.