Scratch

Project-Link
http://scratch.mit.edu/forums/viewtopic.php?pid=259439#p259439

Freeware:
SClub, SoundClub from Bloomoon Software

SoundClub for DOS (export and import as MIDI, MODULE, no WAVE export)
http://www.bluemoon.ee/history/scdos/index.html

SoundClub for Windows (export as WAVE, no MIDI import)
http://www.bluemoon.ee/history/scwin/

Finding a MIDI on http://www.hamienet.com/
Using SoundClub (DOS-Version) to load it, save as *.SN file

open *.SN file in SoundClub for Windows and look at the piano roll

or use the MIDI-XML function from http://www.hamienet.com/
and convert a MIDI-XML file with external tools to a sprite / picture, BMP, PNG

load it into Scratch and play it in my "xaby's composer"