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Tellico vs GCstar: catalog facts
Tellico	GCstar
Free Free and open source under the GPL.	Free Free and open source under the GPL-2.0-or-later licence.
Linux	Windows, macOS, Linux
Fetches item details from Google Books, IMDB, Discogs, IGDB and more Custom collections and fields	Many built-in collection types plus custom models Plugins fetch item details from the web
Mainly aimed at Linux and KDE desktops Online lookups depend on third-party sources	GTK and Perl interface looks dated on Windows and macOS
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-only OR GPL-3.0-only	License: GPL-2.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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