Where could someone find music composition software?

There are two I can think off offhand, and I would imagine loads more that are out there. Try NanoStudio (Windows version of the app is free and includes a pretty powerful looking set of tools you could use for composition, including music (as in notes, bars, treble clef etc). Also have you tried Audacity, which is good for mixing, converting, multi track editing and so on?

There is a link to nano studio on my blog: http:free.celphone.co.nz and you can find audacity easily enough by googling it (else if neither of those are what you are after drop me a line via the contact or post on my blog and I will see if I can find something else for you). Both the above are free and legal. One is open source, the other is free on Windows - and you can pay to have it on devices like ipad, etc. Hope this helps

Kim