Música com Software Livre (Open Source) 

ALSA - Advanced Linux Sound Architecture

Ardour - Digital Audio Workstation

Audacity - Audio Editor

Bristol - Bristol is an emulation package for synthesisers

CALF - Audio Plugin Library

DSP - LADSPA Audio Plugins

DSSI -  API for audio processing plugins

EQ10 - Audio plugin LV2 - parametric equalization

FLAC - Free Lossless Audio Codec

FluidSynth - Software Synthesizer SoundFont

FMIT - Free Music Instrument Tuner

Guitarix - Simple mono amplifier for jack

Hydrogen - Drum Machine

Jack - Low-latency Audio Server

JAMin - Jack Audio Mastering Interface

LinuxSampler - Audio Sampler

LV2 - Portable plugin stardard for audio systems

Muse - MIDI/Audio Sequencer

Om -  Modular Synthesizer and Effects Processor

plugin.org.uk  - Audio Plugins

Qjackctl - Control the JACK sound server daemon

Qsampler - A LinuxSampler GUI front-end 

Qsynth - A Fluidsynth GUI front-end

Qtractor - Audio/MIDI multi-track sequencer 

Rakarrack - Guitar Effects

Rezound - Audio Editor

Rosegarden  - MIDI/Audio Sequencer

TAP-Plugins - Audio Processing Plugins 

Yoshimi - software synthesizer for Linux

ZynAddSubFX- Software Synthesizer