Dear 100 Hour Board,
In response to Board Question #46160, there is a free music notation program that's pretty good called NoteworthyComposer. It has a downloadable version, but it's essentially the same as the real one ($40). I've been using it for years. You can download it here: http://www.noteworthysoftware.com/composer/evaluate.htm.
I'll even venture to say that I like it more than finale or any of the name brands. Hopefully this helps!