I think that most great Mac apps are made by developers that have only a single app. There are only very few companies that manage the jump to multiple apps (I

I think that most great Mac apps are made by developers that have only a single app. There are only very few companies that manage the jump to multiple apps (I can only think of Panic and the Omni Group). Oh, and there's also Rogue Amoeba, with their line of audio apps.