The Ada Source Tree
Here you may find a heavily documented collection of Ada source code. Many modules may be useful in a different context, especially from the util/ directory. All source code is under the GNU GPL. If you want to use some part but need a less restrictive license, feel free to ask.
Ada source code of the music typesetting engine.
Ada source code for music fonts that are directly compiled into the executable. Music fonts consist of vector graphics for music symbols and text characters.
Ada source code for data structures for an internal representation of notated music.
Ada source code to read and write music notation formats as text.
Ada source code for assorted utilities.