Fickle RPG

Fickle RPG is

a narrative roleplaying and cooperative storytelling game, distinguished by the core dice resolution mechanic which has bluffing, bidding, and meaningful decisions. The game is a universal system that can be played in any genre, such as sci-fi, military, zombies, high fantasy, superheroes, etc. An ongoing campaign can be played over multiple game sessions, or as a themed one-shot.

Lizards vs Wizards RPG

Lizards vs Wizards is an RPG set in the “days after the Big Blammo.” You are a sentient lizard. Unfortunately, there also are Wizards, who are “crazy, weird and dangerous humans” who often use lizard parts in their experiements.

It looks like a hoot.

Explore Alterra Tabletop RPG

Explore Alterra is a tabletop RPG that eschews a character sheet in favor of cards that measure spells, weapons, armor, talents and items. It is a very straightforward system, and an interesting setting.

Classic Traveller RPG

GDW’s Classic RPG Traveller  from the late 1970s is currently available for free at Drive Through RPG.

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.