Open source calibre projects
Every project in the registry tagged calibre, ranked by real GitHub adoption.
The official source code repository for the calibre ebook manager
Readest is a modern, feature-rich ebook reader designed for avid readers offering seamless cross-platform access, powerful tools, and an intuitive interface to
:books: Web app for browsing, reading and downloading eBooks stored in a Calibre database
Calibre-Web but Automated and with tons of New Features! Fully automate and simplify your eBook set up!
Manage your ebook library without frustrations. Calibre compatible.
Related tags
Frequently asked questions
How many open source calibre projects are there?
This registry tracks 5 projects tagged calibre, with 76,103 GitHub stars between them. The most-adopted is calibre at 25,923 stars.
Are these calibre projects free to use?
Yes — 5 of the 5 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which calibre project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these calibre projects still maintained?
5 of the 5 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.