Linux, Free

Graphical front end for the spatial arrangement and composition of sounds, providing a spatial scene view and a traditional timeline view which allows you to end and transform the trajectories of sounds.

Stream your music to any software MP3 player.

Audio editor which supports multichannel and floating point formats.

Music notation program that lets you rapidly enter notation for typesetting via the LilyPond music engraver.

Sends and receives MIDI from Alsa sequencers over a network.

Llilypond code editor, including many lilypond directives availables from menu items.

Beat slicer using the QT toolkit, providing amplitude domain and
frequency domain beat matching / zero crossing algorithms.

Audio format similar to MP3 but lossless.

Pattern-based audio sequencer/drum box.

Create rhythms and textures from samples.

Command line not-real-time modular audio synthesis, sequencer, and sampler.

MIDI Data Miner.

Realtime soft-synth written in SND.

Mix music digitally with a clean, simple interface. Works well with a DJ Control Surface.

Simple movie player that synchronizes video to an external time source such as jack transport or MTC.