Yes, PageMaker was a player from git go, but Adobe (who bought it years ago from Aldus) hasn't supported it for two or three years. Adobe InDesign took over PageMaker's publishing capabilities and incorporated (quite seamlessly) elements of Adobe Photoshop and Illustrator. Adobe developed InDesign as a Quark killer and, I think, have more or less succeeded. (Especially since Quark, in many ways more powerful than PageMaker, has always had mostly nonexistent customer support.) Also, InDesign sort of sits on top of Acrobat language so it's native export.
All three programs, though, are quite a bit more than non graphics professionals need. And most publishers want documents in 12 point New Times Roman in MSWord, basically unformatted.