Ardour: ardour.org [1]
JAMin: jamin.sourceforge.net [2]
LADSPA: www.ladspa.org [3], plugin.org.uk [4] (Steve Harris's collection) and tap-plugins.sourceforge.net [5] (a collection from Tom Szilagyi)
ALSA: www.alsa-project.org [6]
Rosegarden: www.rosegardenmusic.com [7]
Quick Toots Series: www.djcj.org [8]
Audio-optimized Linux distributions and packages:
AGNULA (Debian): www.agnula.org [9]
Planet CCRMA (Red Hat/Fedora): ccrma.stanford.edu/planetccrma/software [10]
AudioSlack (SlackWare): www.audioslack.com [11]
Thac's RPMs (Mandrake): rpm.nyvalls.se [12]
SuSE (not necessarily audio-optimized, but has good out-of-box audio support): www.suse.com/us/index.html [13]
Listen to the original song recorded for this article on the author's site at: linux-sound.org/ardour-music.html [14]
Links:
[1] http://ardour.org
[2] http://jamin.sourceforge.net
[3] http://www.ladspa.org
[4] http://plugin.org.uk
[5] http://tap-plugins.sourceforge.net
[6] http://www.alsa-project.org
[7] http://www.rosegardenmusic.com
[8] http://www.djcj.org
[9] http://www.agnula.org
[10] http://ccrma.stanford.edu/planetccrma/software
[11] http://www.audioslack.com
[12] http://rpm.nyvalls.se
[13] http://www.suse.com/us/index.html
[14] http://linux-sound.org/ardour-music.html