NTag
NTag is a free and open source, multiplatform audio file tag editor focused on everyday use cases
GabTag
GabTag is a free and open source program for modifying and autocomplete audio file tags
Soma Radio
Soma Radio is a free and open source simple radio with built-in stations from the website somafm.com
YTMDesktop
YTMDesktop is a free and open source, cross-platform desktop player for YouTube Music
GNOME Music
GNOME Music is a free and open source simple application for playing music
Sound Juicer
Sound Juicer is a free and open source program for extracting audio from CDs with a clear interface and simple settings for Linux
iHeartRadio
iHeartRadio is a free and open source web application for the iHeartRadio service
Olivia
Olivia is a free and open source online/offline cloud music player such as iTunes, Spotify and others
Ex Falso
Ex Falso is a free and open source, multi-platform program for viewing and editing audio file tags
Vvave
Vvave is a free and open source program for playing your music collection for KDE Linux