Outcastia is a classical fantasy setting created by Nitehawk Jarrett. The nation of Outcastia itself started as the city of Dragon's Den that was founded by a successful group of adventurers called "The Outcasts". Those adventurers fell out with the king ruling the surrounding country, and, after a long war, achieved to build their own country.
Besides many of the standard fantasy features (monsters, undead, etc.), Outcastia puts a special focus on dragons and their kind, featuring draconic elves and half-dragons as playable races.
Outcastia material has been published for AD&D and the d20 system.