iabc +++++++

iabc is a free (open source) program for editing music. It uses the
ABC music notation language to produce high-quality graphical notation
or MIDI output. The music notation and the ABC notation can be updated
in real-time, making the construction of tunes using the ABC language
hassle-free (or at least hassle-resistant).

Features:

* Graphical Display of music
* Music printing
* MIDI output
* Multi-voice abc
* Cut/paste/undo/transpose edit functions