FOMUS is a open source software application by David Psenicka that automates many musical notation tasks for composers and musicians, facilitating the process of creating professionally notated scores by allowing the user to separate attributes such as times, durations and pitches from the representation of them in conventional music notation. It is especially useful for composers who work with algorithms and computer music software languages / environments such as CM/Grace, Pure Data and Lisp. It can also be used to import data from MIDI files into a graphical notation editor or creating scores from scratch using text files.

http://fomus.sourceforge.net/

https://sourceforge.net/projects/fomus/