Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Bosca Ceoil - A free, easy to use tool for creating music.
Oceanaudio - Ocenaudio is a cross-platform, easy to use, fast and functional audio editor.
Zynewave Podium - Podium is a modern digital audio workstation (DAW) for Windows.
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.
Renoise - Renoise is a digital audio workstation.