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.
Knowthelist - Knowthelist - the awesome party music player Easy to use for all party guests
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
ServeStream - ServeStream is an open-source application that is intended for HTTP media player streaming, and the media server browser comes with the alluring support for custom online radio and Shoutcast streams.
foobar2000 - An advanced freeware audio player for the Windows platform.
MixTape - Home of MixTape, an OSX application for creating beat matched mixes with simple export to the web or iTunes.