Strawberry
Strawberry is a free and open source, multi-platform audio player and music collection organizer. Clementine Fork
FFaudioConverter
FFaudioConverter – free and open source batch audio converter and effects processor
Byte music player
Byte music player – free and open source, minimalistic yet powerful music player
Pithos
Pithos is a free and open source native Pandora Radio client for Linux
Headset
Headset – free and open source, multi-platform YouTube and Reddit desktop music player
Blanket
Blanket is a free and open source program for improving concentration and productivity by listening to different sounds.
mpz
mpz is a free and open source software for listening to audio, a music player for large collections
Shortwave
Shortwave is a free and open source software for searching and listening to Internet radio stations
Goodvibes
Goodvibes – free and open source, lightweight and simple software for listening to radio online, Internet radio player
MellowPlayer
MellowPlayer is a free and open source software for listening to music from various cloud services in a single desktop application window