Tools
Area Maps, AutoREALM, Campaign Cartographer, Cities and Towns, Dungeon Crafter, Dungeons, Universe Generators, World Generators, Crooked Staff Productions Roleplaying Aids, Dundjinni, Explorations v3 World Building Tools, iG-Tools, Lior's Map Creator, MapX, MoccaMapper, RPGnet: Campaign Cartographer vs. Autorealm vs. Co, RPGnet: Fractal Mapper v6.0, Tavern Maker
3-D Starmaps
Lots of data and links for real space stars and star mapping in general.
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.
Gozzy's Cartographic Emporium
Maps for use with tabletop fantasy roleplaying games.
Lankhmar Geomorphs
Geomorphs for mapping city areas, available in Campaign Cartographer or GIF format.
Maps
Real Maps and Building Plans. A short article with links from the Vesanto Worldbuilding site.
Peter's Guide to Map Creation
Advice about how to draw fantasy maps, with links.
Stellar Cartographer
Offers freelance map-making services for tabletop and online roleplaying games.