foobar2000 - An advanced freeware audio player for the Windows platform.
MilkDrop - 3D audio visualization plugin, compatible with WinAmp plugin API
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
PlayerPro - PlayerPro is a media Player for Android devices running 2.x. Features :
Amarok - The Amarok team is proud to announce the immediate availability of the result of 2 years of hard work, the beta release of Amarok 2. 9. This release is marked by improvements, corrections and polishing of nearly all Amarok features.