Beatport - Beatport is an online music store specializing in electronic dance music and culture.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Spotify - Map shows when two people play same song at same time
foobar2000 - An advanced freeware audio player for the Windows platform.
Publiseer - Publishing should be free and easy
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.