calibre is a ebook library management application. Its features are
divided into the following categories:

* Library Management
* Format conversion (all major ebook formats can be converted from)
* Syncing to ebook reader devices
* Fetching news from the web and converting it into ebook form
* Viewing many different ebook formats
* Giving you access to your book collection over the internet using
  just a browser

Homepage:
https://www.calibre-ebook.com/
