Calibre is a free and open-source e-book management software that allows users to manage their e-books, convert between different e-book formats, and sync e-books with various devices. It was first released in 2006 and has since become one of the most popular e-book management tools available.

One of the most notable features of Calibre is its ability to organize e-books into different categories and add tags, making it easy to search and locate specific books. It also allows users to edit the metadata of their e-books, including the title, author, and cover image, and can even download missing metadata from online sources.

Calibre also provides a powerful e-book conversion tool, allowing users to convert e-books from one format to another, such as from EPUB to MOBI, or from PDF to EPUB. This is particularly useful for those who want to read e-books on different devices that may not support the same file format.

In addition, Calibre supports a wide range of e-book readers, including Amazon Kindle, Barnes & Noble Nook, and Kobo e-readers, and can automatically sync e-books with these devices. It can also connect to online e-book stores, such as Amazon and Google Books, allowing users to browse and purchase e-books directly from within the software.

Calibre is an essential tool for anyone who reads and manages e-books. Its powerful features and easy-to-use interface make it a must-have for anyone looking to organize, convert, and sync their e-book library.

Key Features:

• Library management system to organize e-book collection
• Format conversion for compatibility with different devices
• Built-in editor to modify e-book metadata and table of contents
• E-book viewer with customization options
• Integrated web browser for downloading e-books
• Synchronization options for keeping e-book collection up-to-date across devices
• Extensible with plugins to add additional features and functionality.

Version 0.9.43

New Features

    TXT Input: Allow using various markdown extensions for more features when converting markdown formatted txt files. See http://pythonhosted.org/Markdown/extensions/index.html for details.
    Sending by email: Allow sending by email to an arbitrary combination of email address. Access it via the 'Select recipients' menu entry in the Email To menu.

    Closes tickets: 1207818
    A new 'Sort By' action for the right click menu. This allows sorting on all columns in the library, not just the visible columns. To use it go to Preferences->Toolbars and add it to 'The context menu for books in the calibre library'
    Allow adding images into the comments field, by clicking on the insert link button in the comments editor in the edit metadata dialog.
    Allow skipping the confirm bulk reconvert dialog
    EPUB Input: If the EPUB file identifies an actual cover image in addition to the titlepage html file, use the cover image instead of rendering the titlepage. This is faster and has the advantage that an EPUB to EPUB conversion preserves internal cover structure.
    Get Books: Improve searching by removing punctuation from title/authors before matching.

Bug Fixes

    Conversion: Fix empty inline tags that are the second child of a paragraph causing text change location.

    Closes tickets: 1207735
    Fix book count in tooltip of choose library button not updating
    Kobo driver: When deleting shelves that have been synced, the Activity entry for the shelf was not being deleted. This left a tile for the shelf on the home screen of the Glo and AuraHD.

    Closes tickets: 1208159
    Comments editor: The Insert Link button has no effect until the user clicks inside the comments box, therefore disable it until it is ready, to prevent confusion.

    Closes tickets: 1208073
    Get Books: Update various Polish store plugins

New news sources

    Various French news sources by Malah
    La Capital de Rosario by Darko Miletic
    Jot Down by desUbiKado
    Private Eye by Martyn Pritchard

Improved news sources

    The Sunday Times UK and The Times Online
    Telegraph UK
    Le Monde: Edition abonnés
    The Scotsman