I apologize for the disappearance of the tunes from this page, but I am preparing to finish and release a lot more, as well as polish up some of my previously released stuff. If you really want anything that was here, just email me.
A lot of the NSF resources are aimed at windows. If you want to write NSFs under UNIX (or, really, anywhere with a C compiler), you should download MCKC (local, alt link) and NESASM.
MCKC can be compiled just by entering the source directory in the archive provided, and executing:
% gcc -o mckc *.c -lm
NESASM can be compiled by entering SRC/AS in the provided archive, and executing: (note the newlines in the for command)
% for i in * ../../BIN
do
mv $i `echo $i | tr A-Z a-z`
done
% make -f makefile.unx
This produces ../../bin/nesasm.
You will probably want to read this document (alt. link, local) translated by virt.
To start a new song, I put these files in a fresh directory, and then write the music in an MML file in that directory. Then, I run this script (which has sloppy, unsafe temp file handling) like this:
% makensf my_songassuming my_song.mml (and the contents of templates.tgz) is in the current directory. Ideally, this should produce my_song.nsf, which you can play with festalon or nosefart or whatever.
Make sure that the mckc and nesasm binaries somewhere in your path before you run the script.