pmtex – Preprocessor for MusicTeX
Free license not otherwise listed, or more than one free license applies
typesetting music and related stuff
Maybe you are interested in the following packages as well.
- snote: Shaped notes for MusicTeX
- gchords: Typeset guitar chords
- figbas: Mini-fonts for figured-bass notation in music
- musixtnt: A MusiXTeX extension library that enables transformations of the effect of notes commands