I added a list of active (still in existence) board wargame publishers on the right. If anyone knows anymore, please let me know!
I left out most DTP publishers, mainly because it's hard to tell if many are still around, and what products they support and whatnot. Plus, I hate having to do work for my games (if they have die-cut counters, I'll happily list them :) ).
Valley Games is also missing, because I think something is up with their website, and don't want to look until I get home.