Caliber is a digital book library management software for computers. It is a free and open source tool that allows the user to manage their e-books in an organized and centralized way.
It provides the user with the ability to organize e-books, organize collections, edit metadata, convert e-book formats, read books, create virtual libraries, and much more.
Caliber supports many common e-book file formats, including epub, mobi, pdf, HTML, text, CBZ and CBR.
It also has integration with services like Amazon, Dropbox, Google Drive and Apple iCloud.