Quotidian Hell 
 
Look what The Internet hath brought us today...
30 Dec 2006

Planetocopia
Planetocopia is a group of model worlds supporting intelligent life. Some of these worlds are set in our future, some are alternate Earths, some are purely imaginary experiments in planetology, biology, sociology. They fall into four series: Tilt!, Futures, the Biosphere Variations, and Caprices.
Via From the Heart of Europe.