QuteCsound is a simple cross platform editor and front-end for Csound.
VAC helps you transfer audio (wave) streams between applications and/or devices.
Resize MP3 by re-process without appreciable loss of quality.
NorQualizer is a smart audio equalizer / normalizer
Mono-a-Mono is an audio restoration program for recovering vintage recordings.
Ion-editor is a MIDI-editor for advanced controlling over the famous Alesis ION.