music software:
pure-data.org
pd webring
jmax
loopool for max/msp
sound&midi 4 linux
ardour
jack
alsa
ladspa
supercollider
supercollider 4 linux
soulseek
gtk-gnutella
ffmpeg
ogg vorbis
linux remix project

OS
linux
debian
freebsd
openbsd
hurd


languages: perl