Cider
Cider is a cross-platform Apple Music client. Free and open source program
Monophony
Monophony – listening to music from YouTube Music. Free and open source program
Spotube
Spotube – lightweight Spotify client which handles playback manually, streams music using Youtube & no Spotify premium account is needed. Free cross-platform and open source software
Kasts
Kasts is a program for listening to podcasts on a desktop computer and a mobile device. Free and open source program
Harmonoid
Harmonoid is a free and open source, cross-platform program for playing local and music from YouTube
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
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
Hypnotix
Hypnotix is a free and open source program for watching live TV streaming, movies and series, as well as listening to radio for Linux