Calibre

Calibre is a powerful and easy to use e-book manager. It's an open-source project, it was started on 31 October 2006, developers are still developing more functions to make it more powerful. It is used in over 200 countries and has been translated into a dozen different languages by volunteers. Calibre has become a comprehensive tool for the management of digital texts, allowing you to do whatever you could possibly imagine with your e-book library.

Calibre has some great features. Calibre can download all the metadata for an e-book, including title, author, publisher, ISBN, tags, cover or summary, you can also edit these metadata. This makes your eBook library looks more informative.

Calibre supports search and download e-books from online store or websites, it supports search from almost all the popular e-books store.

Calibre supports download entire websites and converts them to any eBook format, meaning you can read your favorite news articles or blogs on practically any eBook reader, from the Kindle to the Nook to the Kobo and everything in between.