AKoff Music Composer - description from Softdepia.com:
This software is designed for recognition of polyphonic music from audio source and its conversion to MIDI score. Now one can compose music without MIDI keyboard and even without knowlege of notes or how to play musical instruments. It is as easy as humming a tune into a microphone and Composer will do the rest. Composer will take into consideration individual performance style tracking note dynamics and pitch bends.
AKoff Music Composer is a "Free to try" program. You can download and try it for an evaluation period.