Jajuk - Jajuk is software that organizes and plays music using Java.
Guayadeque - Guayadeque is a music management program designed for all music enthusiasts.
Sayonara Player - Sayonara is a simple but nice audio player and holds a lot of features like a library, id3 tag...
Pi MusicBox - Pi MusicBox is a great music platform where you can create songs and is the only streaming music player for Spotify, Google Music, Podcasts, SoundCloud, Webradio, and others.
Audirvana Plus - Build for sound quality
Roon (Music Player) - Roon is a music playing application for audiophiles