The following is just a selection of ideas our editorial xvarts have collected over the years. We'd love proposals about any of these, but we'd love YOUR ideas even more! (It saves us from having to rewrite this list!)
The Underdark of the Flanaess, an Underview.
Dwarves & Dwarfhalls of the Flanaess.
Gnomes of the Flanaess
Sea Elves of the Azure
Irongate: History and Details.
The Spindrift Isles.
Saints in Greyhawk.
Dra-Mur-Shou--City of Illithids.
Shadows of the Depths: The Duergar
Shamans in Greyhawk.
The Myth of Vatun.
Tzunk and Yagrax--Who Were They?
The Fading Lands
Hierophants of the Flanaess
Secrets of the Scarlet Sign
Artifacts of the Baklunish Empire/Suel Imperium/Oeridian clans/Flan tribes
The Sea of Dust
The Plains of the Paynims.
Land of Black Ice.
North of the Land of Black Ice.
"Hyperboria", aka Hyborre
Ancient Arcana (spells, magic items)
Races of Oerth (grunge, beastmen, tasloi, thri-kreen, half-selkies; races converted to newer game systems or editions...)
NPC Villain Histories, profiles, adventures: (Clerics of Erythnul and Incabulos), Tuerny, Evard, Iggwilv, Kyuss, etc...