VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Jajuk - Jajuk is software that organizes and plays music using Java.
foobar2000 - An advanced freeware audio player for the Windows platform.
Music Player Daemon - Music Player Daemon is a flexible, powerful, server-side application for playing music.
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.
Roon (Music Player) - Roon is a music playing application for audiophiles