Name: Exaile
Homepage: https://exaile.org/
Why: Exaile is a maintained fork of Amorak 1.4 in GTK. Because it is GTK it should integrate really well with Budgie, Gnome, etc. Could be a nice alternative to the music players currently included in the repositories.
Open Source: Yes
Source Code: https://github.com/exaile/exaile/releases/download/4.1.2/exaile-4.1.2.tar.gz

Would love to have this on Solus!