Fudge is a generic role-playing game system for use in freeform role-playing games. The name "FUDGE" was once an acronym for Freeform Universal Donated Gaming Engine and, though the acronym has since been dropped, that phrase remains a good summation of the game's design goals. Fudge has been nominated for an Origins Award for Best Role-Playing Game System for the Deryni Adventure Game.

Fate is a generic role-playing game system based on the Fudge gaming system. It has no fixed setting, traits, or genre and is customizable. It is designed to offer minimal obstruction to role-playing by assuming players want to make fewer dice rolls.