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BiblioteQ vs GCstar: catalog facts
BiblioteQ	GCstar
Free Free and open source under a BSD licence.	Free Free and open source under the GPL-2.0-or-later licence.
Windows, macOS, Linux, Android	Windows, macOS, Linux
Catalogs many media types, from books to video games Works with PostgreSQL for shared use or SQLite for a single file	Many built-in collection types plus custom models Plugins fetch item details from the web
Very many options, which takes time to learn Interface is functional rather than polished	GTK and Perl interface looks dated on Windows and macOS
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License: GPL-2.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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