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
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Publiseer - Publishing should be free and easy
foobar2000 - An advanced freeware audio player for the Windows platform.