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.

• Auto adding: Option to add files of all types, not just ebooks. You can now tell calibre to auto add all file types, instead of just known ebooks via Preferences->Adding books->Automatic adding.
• Quick view: Show the title/author/series columns in the same order as in the main book list.
• Update Kobo driver to allow sending kepubs
• Allow right clicking on covers to copy them in the metadata cover download dialog.

• Titlecase: Fix incorrect title casing for some non-English words.
• Kobo driver: Fix errors when using rating or numerical custom columns to create shelves.
• E-book viewer: Allow searching to work with hyphenation enabled, provided you are searching for whole words. Searching for partial words may still not work. For robust searching, turn off hyphenation in the viewer preferences.
• Get books: Update the B&N UK store plugin to handle changes to the B&N UK website
• Apply changes being edited when clicking apply in the email preferences list.
• Fix crash on linux systems whose fontconfig configuration includes paths to in an undecodable encoding.
• Fix editing custom column values in the book list not allowing change of case.
• Kobo driver: Fix latest firmware update for Kobo Wifi causing calibre to not recognize it.
• Content server: Fix virtual libraries with an ampersand in their names not working