The GNOME Project Rhythmbox
Rhythmbox is an open-source audio player and music organizer. It is used on Unix-based operating systems, like Linux. Rhythmbox can operate in different desktop environments but is optimized for GNOME. It can easily manage libraries with tens of thousands of songs due to its high scalability. It offers a comprehensive feature set that includes complete support for Unicode, quick but effective tag editing, and a number of plug-ins.