Version 2.5 (Released 3 October 2014) of Calibre licensed under the GNU GPL v.3 for Linux (x64).

Calibre is a free and open source e-book library management application developed by users of e-books for users of e-books.

Official site: calibre-ebook.com

Please seed for as long as you can.

Changes in 2.5 New Features

E-book viewer: Allow changing the website that is used as a dictionary for looking up words in the viewer. Click the Preferences button in the viewer and choose the dictionaries tab to customize the website.
Edit book/Book polishing: When embedding fonts or subsetting embedded fonts, handle the :first-letter and :first-line pseudo-element style rules.
Windows driver for Trekstor Pyrus 2 LED.

Bug Fixes

Fix a typo preventing calibre from recognizing the new Kobo Aura H2O
Edit Book: Spell Check: Fix replaced words coming back into the list when toggling the "Show only misspelled words" setting
Edit Book: Spell Check: Fix replacing a word with multiple words causing the replacements to show up erroneously in the list of misspelled words
Edit Book: Fix leading or trailing hyphens on words being ignored when spell checking.
E-book viewer: Fix a regression, caused by a Qt 5 behavior change, that caused incorrect colors to be shown when viewing MOBI files that use CSS 3 color specifications internally.
MOBI Output: Handle input documents that use CSS 3 syntax for colors by converting the color to the #RRGGBB format required for MOBI
Tag Browser: Fix drag and drop of books onto a language not setting the language.
Tag Browser: When renaming an item that is currently being searched for, remove the search indicator, as the search will no longer match the renamed item.
Bulk metadata edit: Fix getting cover from EPUB files that have no cover image by rendering the first page as the cover not working.
Custom cover generation: Fix disabled color schemes not being saved
Wireless device driver: Fix a regression in 2.4 that caused book matching to run slowly when connecting to calibre companion

Improved news sources

Sueddeutsche Zeitung
The Hindu
Carta