Finale has an entire suite of programs all devoted to music notation. Finale NotePad is quite nice and is completely free. It has more advanced programs for more advanced tasks, but the free one is very useful.

I used to have Noteworthy, never really got along with it. I use Cakewalk (definitely not free though) to make midis, and Finale NotePad to make beautiful scores out of my tunes. It's also very easy to use.