I have been using Noteworthy Composer for over 10 years now. It is easy to learn initially and for a simple, inexpensive program it is amazing what it is capable of. Whole symphonies have been input to Noteworthy and I have written a piece for recorder orchestra in 7 parts using it.

I currently have it running in Linux using Wine. Print preview causes it to crash periodically but otherwise it works pretty well in Linux.

Some of the online free sheet music sites use Noteworthy.

Geoff