- [BicBucStriim](http://projekte.textmulch.de/bicbucstriim/) - Provides web-based access to your Calibre Library's e-book collection. ([Source Code](https://github.com/rvolz/BicBucStriim)) `MIT``PHP`
- [Calibre Web](https://github.com/janeczku/calibre-web) - Web app providing a clean interface for browsing, reading and downloading eBooks using an existing Calibre database. ([Source Code](https://github.com/janeczku/calibre-web)) `GPL-3.0``Python`
- [COPS](https://blog.slucas.fr/en/oss/calibre-opds-php-server) - A lightweight e-book server alternative to Calibre content server or [Calibre2OPDS](https://calibre2opds.com/2011/11/03/new-site-for-calibre2opds/). ([Demo](http://cops-demo.slucas.fr/index.php), [Source Code](https://github.com/seblucas/cops)) `GPL-2.0``PHP`