Calibre es un gestor y organizador de libros electrónicos, que permite la conversión de los formatos de archivos para libros electrónicos más utilizados.

Está programado en los lenguajes Python y C, y es multiplataforma, ya que permite ser ejecutado en GNU/Linux, Mac OS X y Microsoft Windows.

Calibre 0.8.67

Ha sido actualizado a la versión 0.8.67 con varios cambios:

New Features

PDF Output: Generate a PDF Outline based on the Table of Contents of the input document
Conversion: Add an option under Structure Detection to set the ‘Start reading at’ metadata with an XPath expression.
Speed up changing the title and author of files with books larger than 3MB by avoiding an unnecessary extra copy.
Wireless device driver: Make detecting and connecting to devices easier on networks where mdns is disabled
PDF Output: Allow choosing the default font family and size when generating PDF files (under PDF Options) in the conversion dialog
Metadata dialog: Comments editor: Allow specifying the name of a link when using the insert link button.Closes tickets: 1042683
Remove the unmaintained pdfmanipulate command line utility. There are many other tools that provide similar functionality, for example, pdftk and podofo

Bug Fixes

Catalogs: Fix regression that broke sorting of non series titles before series titles
PDF Output: Do not create duplicate embedded fonts in the PDF for every individual HTML file in the input document
Fix regression that broke DnD of files having a # character in their names to the book details panel
PDF Output: Allow generating PDF files with more than 512 pages on windows.Closes tickets: 1041614
Fix minor bug in handling of the completion popups when using the next/previous buttons in the edit metadata dialog

New news sources

Cumhuriyet Yzarlar by Sethi Eksi
Arcadia by Masahiro Hasegawa
Business Week Magazine and Chronicle of Higher Education by Rick Shang
CIPER Chile by Darko Miletic

Improved news sources

Coding Horror
TIME Magazine

Podemos instalar o actualizar a Calibre 0.8.67 en Ubuntu agregando este PPA:
sudo add-apt-repository ppa:n-muench/calibre
sudo apt-get update
sudo apt-get install calibre