Otherlands: Alternate Core is a 3.5 D&D game whose purpose is to see what it's like to experience fairly typical D&D adventuring but with a completely different set of "core" or standard races and classes. Humans, dwarves, elves, and others -- they're all left out of this game, and the 11 core classes of Player's Handbook are not in either. Instead, we're going to be using various races and classes from other official sourcebooks. Incarnum races and classes? In. Tome of Battle classes? They pretty much replace the fighter, monk, and paladin classes of your typical campaign. There are psionic and arcane classes available too, and races like raptorans and spellscales. If this sounds interesting, click on the link above and take a look at the advertisement page.