I just published the turn-based strategy game "Dawn of the Modern Age".  It is a purely 2-D game created with Python and pyGame, but it has a fairly detailed and sophisticated economic model that should make it interesting to strategy gamers.  The game includes:

• 29 different resources randomly distributed over a vast game world
• 16 different manufactured goods
• City development with residential areas, markets, government centers, factories, streets, power and water plants, and more
• Technological development to progress from the 19th to the 20th Century 
• Military units to defend and expand the nation, from swords and muskets to tanks and M-16's
• A world map drawn with a special topographic shading and coloring routine from geodesic data of a large part of the United States

The main objective of the game is to build a nation of a specified size with a substantial standard of living,including everything from the five food groups, spices, furniture, clothing and stoves to electric power and telephone service.   In order to accomplish this goal, the player searches for resources; founds and develops cities; creates mines, farms and timber operations; builds city streets and state roads; researches technologies, like internal combustion, steel and telephones; and builds and deploys a military for battles of defense and conquest.