Linux, Free

Theremin soft synth.

Petri-Foo is a software sampler based on the Specimen Sampler Project.

LAoE is a rich featured graphical audiosample-editor

Plays back MusicXML files and converts them to MIDI.

A system of interconnectable modules for the recording, processing, and playback of real-time audio.

CD-writing software for Linux

Manipulate stereo signals and invert phase. [VST]

MrsWatson is a command-line based audio plugin host used for debugging and batch processing based on the old MissWatson.

Karaoke CD+G disk to MP3+G Ripper.

Converts voice files between Oki (Dialogic) ADPCM and linear (8 and 16 bit)

Subtractive synth with a sharp bandpass filter; center frequency moves relative to the frequency of the playing notes. [Standalone/VST]

The theory behind binaural beats is that if you apply slightly different frequency sine waves to each ear, a beating affect is created in the brain itself, due to the brain's internal wiring.

Create, play and print beautiful sheet music

An experimental loop based sampler for Linux or FreeBSD

Uses non-bandlimited oscillators which can be transposed near to and beyond the Nyquist frequency, causing most of their spectra to be aliased back into audible non-harmonic frequencies. [VST]