Velmont
First Post
I use Maptools (as most of the DM's appear to use) - RPTools - Launch
Some use Virtual Battlemap (currently down, does this sometimes) - http://virtualbattlemat.com/
I've seen a few who use excel as well.
I'm unaware of anything that can print out largescale maps though, but I've never tried it.
Add ditzie. It's like an improved virual battlemap. The two great thing I see on it is A) All your map have a different URL, so you have a backup of each maps. B) You can add mouseover information on each token (great to show HP and defenses). I never use it yet, but I might do so.