Fudge was written by Steffan O'Sullivan with extensive help from the rec.games.design community and is available for free on the Internet on a variety of sites, most notably FudgeRPG.com, the home of Grey Ghost Press. Grey Ghost Press also publishes a printed version of the game, "Fudge Expanded Edition," which includes a basic fantasy setting, along with other support material for the game.
"Traits" in Fudge, which consist of Attributes, Skills, Gifts, and Faults, are rated on an ascending verbal scale: Terrible, Poor, Mediocre, Fair, Good, Great, Superb, and Legendary. Fudge uses customized six-sided dice with two plus signs, two minus signs, and two blank sides. A number of these dice are rolled together, usually 4 or "4dF" in Fudge notation, to produce a result from -4 through +4. This result is applied to the appropriate Trait with the goal of matching or surpassing the Difficulty Level of the test. There are also several alternate dice systems available that use regular six-sided dice.
Many Fudge resources--from alternate rules to campaign information to world books--are available online. The Grey Ghost Games site links to many of them.