Fantasy Grounds
Fantasy Grounds delivers the premier Virtual Table Top experience. Full character sheets, combat tracker, drag and drop content, combat automation, effects, mapping and much more.
http://www.fantasygrounds.com/
Devin Knight
Devin’s Token Site contains dozens of collections of amazing tokens for use with your favourite VTT. Ther are many high quality free token packs available as well as many newer packs for sale. Personal and commercial licenses are available.
http://immortalnights.com/tokensite/
Game Masters Campaign Kit
Amazing Fantasy art kits for use in Virtual Table Top role playing, tablet and pc game creation, game content. Personal and commercial licenses available.
http://www.rpgartkits.com/
Campaign Cartographer
Authors, games designers and thousands of gamers have mapped out the worlds of their imagination with Campaign Cartographer 3.
https://secure.profantasy.com/products/cc3.asp
Dundjinni
Dundjinni is a full-featured fantasy map creation program. It allows users to create walls and floors, place objects, insert text, and more. It boasts an intuitive interface and an impressive selection of objects and textures.
http://www.dundjinni.com/
Pyromancers
Amazing free online mapping tool making use of a good range of CSUASC tiles.
http://www.pyromancers.com
WyldFurr
Studio WyldFurr creates a great array of character tokens in dozens of poses as well as great tilesets for making your own RPG maps.
http://www.wyldfurr.com/
Map A Week Archive
A collection of maps provided by Wizards of the Coast.
http://www.wizards.com/default.asp?x=dnd/arch/mw