Dogmazic.net, Free music
Elody, a music composition environment
Ubuntu Studio
MAO Libre [fr]
Sound & MIDI Software For Linux
The Freesound Project
A multi-lingual dictionary of musical terms
Musique et audio [fr]
Creative Commons License for Audio work
Rosegarden
Jack Audio Connection Kit
QJackctl
DSSI
LADSPA
Steve Harris's plugins
Tom's Audio Processing plugins
Hydrogen
QSynth
ZynAddSubFX
Ardour
Jack Timemachine
Rezound
Audacity
EasyTAG
How to create a Audio CD