Litko game accessories has some interesting markers to use.
Litko Game Accessories
Tired of buying an expensive board game and finding it to be a complete dud? This site offers a review of the product with lots of photos of the contents.
Boardgame Geeks
Looking for WW1 posters for your miniature buildings? Try this site.
Period posters
General Quarters is a great ruleset for naval gaming. This site has lots of accessories to use for naval gaming with these rules.
General Quarters Accessories
A project I'm working on. Most of the figures are painted. Most of the terrain and buildings are done. Just have to write up the rules.
http://web.archive.org/web/20030826012024/http://www.novag.org/arf/html/
An excellent site dedicated to WW2 ballistics.
http://www.wwiiequipment.com/pencalc/
If terrain is too expensive to buy or you don't have the time to make it try these.
http://www.juniorgeneral.org/load.php?Period=0
A site dedicated to Canadian WW2 armour.
http://www.armouredacorn.com/index.html