Canonfire! is a fan web site, owned by author Gary Holian, which acts as a repository for information about the World of Greyhawk campaign setting for the Dungeons & Dragons roleplaying game. The site is notable for its large collection of articles about the now out of print setting ranging from simple indexes of previously published game content to fan fiction and quasi-official missives from authors associated with the setting such as Erik Mona's "The Final Word on Iuz and Company" (2001).
Canonfire! was created by the members of the GREYtalk mailing list as a repository for creative material. The site hosts forums and chat rooms for fans to discuss, debate, and share ideas about the setting in addition to its archives.