DFX Audio Enhancer - Formerly known as DFX Audio Enhancer, FxSound Enhancer instantly boosts the sound quality of the music on your PC.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Equalizer Pie - Equalizer Pie is a free audio manipulation application for OS X.
foobar2000 - An advanced freeware audio player for the Windows platform.
FxSound - Clearer Sound for Your PC. The new FxSound boosts your sound quality, volume, clarity and bass.
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.