Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
TwistedWave - TwistedWave is one of the unique audio editors that allow you to edit your music file online without any installation.
foobar2000 - An advanced freeware audio player for the Windows platform.
Radium - Radium is a music editor with a new type of interface.
Winamp - Winamp is a media player that allows users to play multiple-file formats, arrange media in a varied file-management system, and play unique media with AAC encoding.