My own high-fantasy world, the Realms of Ander, is based heavily upon the long-running roleplaying-game 'Dungeons and Dragons'. Indeed, it is set in the same 'multiverse' as most of D&D's campaign settings and has a few ties to some specific worlds (specifically, 'Dragonlance' and 'Spelljammer', and others to a lesser extent). However, as I don't play D&D and don't understand the rules (no one to play with; I just enjoy reading the modules), you won't find any stats or other game resources. But if you want to incorporate theme elements into your own campaign, hey, go right ahead.
That said, here's the meat of the page.
As you can see, it's still a little sketchy: I'm still developing the setting. Stay tuned for coming improvements. Some of the material here is owned by TSR, Inc./Wizards of the Coast; if asked to remove any material for legal reasons, I will comply.