-In other news, if you haven't looked at the new fixed up Subterranean Design site, do so forthwith. It is just page after page after page after page after page of amazing dungeon eyecandy. Not often you can get vacation and D&D ideas simultaneously...
-After James gave me the semi-exhaustive list of recently published free adventures he decided, jut to be more awesome, that he'd slide me over this...
List of Free Setting Stuff
he's accumulated over the years. This is just the more organized and easy-to-access stuff...
The World of Thundarr the Barbarian (Download widget at The Savage Afterworld.)
Savage Swords of Athanor (PDF now available for free.)
Guide To The Realms of Aedenne.
Abbernoth campaign setting.
The Metal Earth (Rules & Resources on the Left. Map on the Right.)
The Yaqqothl Notebook.
Mazes & Minotaurs (Mythika setting stuff, passim and the Midgard setting in the Vikings & Valkyries supplement)
Exit 42A! (An Encounter Critical Sandbox.)
Southland. (Free from Robert Conley. One of the settings from his Points of Light)
For the Moorcock fans, Chaos Cults of the Young Kingdoms and Gods of Law in the Young Kingdoms (for the second item, the picture link works.)
Ivid the Undying (fan formatted PDF of the free WotC files.)