Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Colibri Lossless - A native audio player for macOS built from scratch using the award-winning BASS audio engine.
GarageBand - GarageBand is a fully equipped music creation studio for Mac
Boson Audio Editor - Boson is an audio editor/recorder for Mac OS X.
Adobe Audition - Mix, edit, and create audio content in Adobe Audition CC with a comprehensive toolset that includes multitrack, waveform, and spectral display.
LoudLab - LoudLAB is an audio application designed to Monitoring & Control loudness levels.