The Fractal Mapper

High-powered mapping system that lets gamers create any type of map desired - dungeons, continents, and cities. Offers trial download.
http://www.nbos.com/products/mapper/mapper.htm

Explorations v3 World Building Tools

Build your custom hi-res landscapes, walls, buildings, and dungeons with Explorations World Building Tools.
http://www.explore-rpg.com

RPGnet: Fractal Mapper v6.0

Review by George Legeza. "Fractal Mapper isn't perfect, but it's pretty close to being my ideal rpg mapping suite. It is not as powerful as campaign mapper, but what it lacks in features and options it makes up for in ease of use."
http://www.rpg.net/news+reviews/reviews/rev_5889.html

RPGnet: Campaign Cartographer vs. Autorealm vs. Corel Draw

Review and comparision of the programs and how suitable they are for drawing maps.
http://www.rpg.net/news+reviews/reviews/rev_2821.html

MapX

A free mapping program for roleplaying games, with backgrounds and user-contributed maps.
http://www.realmcreator.com/

Lior's Map Creator

A freeware tool to design wilderness and dungeon maps. Includes sets of tiles and objects and editors to create additional ones.
http://liors.net/software/map_creator/index.php

Dundjinni

Mapmaking and adventure creation software, with sales and user support and free artwork, textures, and maps.
http://www.dundjinni.com/

iG-Tools

Site sponsored by Irony Games that provides nifty ONLINE mapping utilities that generate maps from dungeons and hex-grid open spaces to simple 3-D terrain.
http://www.irony.com/webtools.html

Tavern Maker

A freely available generator of taverns, including floorplans, names, patrons, menus, and rumors.
http://www.tavernmaker.de/eng/men-eng-inf.htm

MoccaMapper

A GPL Java program for creating inch squared floor boards for role-playing and board gaming purposes.
http://groups.yahoo.com/group/MoccaMapper/

Yahoo Groups: Fractal Mapper

A mailing list devoted to sharing techniques, maps, and symbols for Fractal Mapper.
http://groups.yahoo.com/group/FractalMapper/