Map Making

3-D Starmaps
Lots of data and links for real space stars and star mapping in general.
http://www.projectrho.com/starmap.html

Fantasy Mapmaking 101
Map making is an art form dating back into the depths of time. Before there were GPS' (global positioning satellites), there were maps. It took a skilled mathematician and artist to create a precise map, and sailors and navigators around the world relied on exact accuracy. Maps can be symbolic, imaginary, or just plain useful.
http://www.fantasymaps.com/101/

Lankhmar Geomorphs
Geomorphs for mapping city areas, available in Campaign Cartographer or GIF format.
http://www.geocities.com/Area51/8306/lankhmargeomorphs.html

Peter's Guide to Map Creation
Advice about how to draw fantasy maps, with links.
http://www.brodt.dk/peter/maps.html