I'm just getting the hang of Noteworthy. So far its the best I've found for what I want to do. (enter standard musical notation, or hook up a keyboard and play it in.) Can someone expand on the comment about Noteworthy incompatibility? It can save in type 1 Midi or type 0 Midi, aren't those standard cross-platform file types? Or does Noteworth make weird Midis?

The other program I've tried is Musette. Similar to Noteworthy, and it comes as freeware or "premium". Nice and simple to use, but I find it annoying to have a program billed as freeware when the freeware version is very limited and the documentation (which sucks) makes endless references to "this feature only available in the premium version".