All of these are approved for use on your compositions! (Not all are free – beware!)

Noteworthy Composer: http://www.noteworthysoftware.com/composer/evaluate.htm

Finale Notepad: http://www.finalemusic.com/notepad/

Musescore: http://musescore.org/

Notation Composer: http://www.notation.com/NotationComposer.php

Noteflight: https://www.noteflight.com/login

other software:

This software will allow you to cut and clip an audio file: http://audacity.sourceforge.net/