Case, Great Eastern Cutlery, Queen.
I think some of the Solingen slippies are carbon steel as well.
Check www.loewenmesser.de and www.otter-messer.de and don't forget the French Le Sabot, MC Cognet (Douk Douk, Ecureuil, ...), Pradel, Le Pionier, Nontron, and others. Also the Swedes (some Eka knives), the Spanish (some navajas) and the South-African (German origin) Okapi knives.