Hi,
I've written a short paper on different methods of notation which have evolved
recently, and thought that some readers here might be interested.
The paper is available at
http://indigo.uk.to/~david/notes/music/notation.pdf .
The primary languages discussed are Mondrian, Abc notation, Csound, and Lilypond.
The paper wasn't by any means intended to be comprehensive, so I haven't discussed
other tools such as Philip's Music Writer, or the various audio programming
environments such as SuperCollider, Chuck and others.
It's not necessarily Linux-specific, but the software discussed is all FLOSS and
available on Linux - and the information might be of interest to people who use Linux to
compose music.
Feedback and corrections are welcome.
david