Write the music in ABC and use ABCMIDI to convert.
Total cost 0.00 in any currency.

There is a new(ish) package for Windows to edit and print ABC as staff notation, much better that ABC2WIN, but I can't remember what it's called. I think that's free too.
abcm2ps is certainly free. It's what I use, and it's a no-brainer choice in Linux - This site has instructions for making it work on Windows.

As an added bonus, the ABCMIDI package also includes the abc2abc program, which can do a number of transformations, the most useful of which (to me) is transposition.

Anahata