While Working Designs only did localizations, they did them very well, I always thought. I'd LOVE to see that company revived.
Westwood Studios, Strategic Simulations Inc. Interplay Sir Tech Software Origin. Its past time for new Ultima and Wing Commander games. Bullfrog. Just as a previous poster, I'm still waiting for Dungeon Keeper 3.
Not sure if they're still alive, or if they've died, but .. New World Computing.
I'd love to see Squaresoft and Enix go their separate ways, and develop their own games once more.
Quest Software. I don't know what else tehy did, but EA published their game, Legacy of the Ancients, and its time for us to find another Legacy.