Calibre: Free Ebook Management Software for Organizing, Editing, and Converting Ebooks

Calibre is a free and open-source e-book management software that allows users to organize, edit, and convert e-books in various formats. It supports a wide range of e-book formats such as EPUB, MOBI, PDF, and many more. Users can also use Calibre to download and manage e-books from various online sources. Additionally, Calibre offers features such as e-book conversion, e-book reader syncing, metadata editing, and bulk editing. It is available for Windows, macOS, and Linux operating systems.