Sononym - Finally, a sample browser that understands audio
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Samplism - Feature-packed, audio asset manager for Mac.
Oceanaudio - Ocenaudio is a cross-platform, easy to use, fast and functional audio editor.
Soundly - Functional music for better sleep, focus and relaxation
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.