WaveShop - Open source audio editor

Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.

TwistedWave - TwistedWave is one of the unique audio editors that allow you to edit your music file online without any installation.

Adobe Audition - Mix, edit, and create audio content in Adobe Audition CC with a comprehensive toolset that includes multitrack, waveform, and spectral display.

Radium - Radium is a music editor with a new type of interface.

GarageBand - GarageBand is a fully equipped music creation studio for Mac