freedb is a database of compact disc track listings, where all the content is under the GNU General Public License. Developed by Ti Kan
License: Open Source
Beets is a highly customizable music library management tool that excels in advanced tagging and customization, making it ideal for power users. On the other hand, Freedb offers a simpler, user-contributed database solution that's easier for casual users, but lacks the flexibility and features that Beets provides.