Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
SampleTank - THE MASTER-QUALITY MIDI SOUND MODULE AND GROOVE WORKSTATION FOR THE MOBILE ARTIST.
Oceanaudio - Ocenaudio is a cross-platform, easy to use, fast and functional audio editor.
Jokosher - Jokosher is a simple and powerful multi-track studio.
GoldWave - GoldWave. Digital Audio Editing Software. Record • Restore • Convert • Analyze. Fully loaded to do everything from the simplest recording and editing to the most sophisticated audio processing, restoration, enhancements, analysis, and conversions.
Fission - Edit audio in minutes, not hours.