Jajuk - Jajuk is software that organizes and plays music using Java.
Sayonara Player - Sayonara is a simple but nice audio player and holds a lot of features like a library, id3 tag...
Music Player Daemon - Music Player Daemon is a flexible, powerful, server-side application for playing music.
Audirvana Plus - Build for sound quality
Roon (Music Player) - Roon is a music playing application for audiophiles
MPV - MPV is an audio and movie player based on MPlayer and mplayer2.