dir2opds is a self-hosted OPDS ebook server that turns any folder into a digital library. No database, no Calibre—just point it at your book collection and browse or download via any OPDS-compatible ebook reader or web browser.
Cost / License
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Self-Hosted
- Docker
Canada
Best alternatives are 
calibreand
51 alternativescalibreand