The best open source alternative to Deezer is Funkwhale, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Deezer and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Deezer are Libre.fm (Free, Open Source), Ampache (Free, Open Source), Audius Music (Free, Open Source) and nuclear (Free, Open Source).
Jukesy is an application that helps you watch music videos from YouTube. With Jukesy, you can create playlists, discover new music, listen to your favorite ... Jukesy is opensource and can be forked at github.
dingo is the world's first free and open-source music streaming app that allows you to easily find, discover and play new music. It combines the power of last.fm and YouTube into one app to deliver the ultimate music library available on demand.