Dungeonaday.com was conceived and created by Monte Cook.
Monte has been involved in rpg design for more than 20 years. Although he started gaming with D&D, he got his start professionally working on ICE's game, Rolemaster, and then Champions. Years later, he worked for TSR and then Wizards of the Coast as a senior game designer. He co-designed 3rd edition D&D, Return to the Temple of Elemental Evil, Book of Vile Darkness, Dead Gods, Planewalker's Handbook, Labyrinth of Madness, and a number of other official D&D products.
All maps and the Dungeonaday.com logo are created by Ed Bourelle. Ed is the cartographer for such products as Ptolus: Monte Cook's City by the Spire, Exalted, Dungeons of Doom, and more. Ed also has his own company, SkeletonKey Games, where he produces map tiles and other cartography products to enhance your games.