PlanetGen

PlanetGen is an extremely good fractal world map generation program suitable for complete RPG world creation. You can select map sizes up to 3072×1536 pixels. Determine land and islands, zoom level, colors, and seasons. Enable grid lines to delineate major surface zones. Produces climate and relief maps to aid in determining your world features, cities, flora, fauna, and landmarks. The resultant mercator projection maps can be wrapped to spheres for use in 3D programs. Included is a separate companion 3D spinning sphere viewer program that you can adjust the spin rate, viewing distance and select other bitmaps to display.