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Quod Libet vs fooyin: catalog facts
Quod Libet	fooyin
Free The open-source application is available without a license fee.	Free The open-source application is available without a license fee.
Windows, macOS, Linux	Windows, Linux
Flexible metadata searches and plugin support	Flexible layouts and an extensible plugin system
Primarily designed around managing an audio library.	Audio CD playback and ripping are Linux-only.
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.