KDeasy is described as 'With the KDeasy Kindle Manager software you can manage your Kindle library from computer, even if you have a library containing hundreds of books. It is the only freeware to manage Kindle books without limits!' and is a eBook Library in the News & Books category. There are eight alternatives to KDeasy for a variety of platforms, including Windows, Online / Web-based, iPhone, iPad and Self-Hosted solutions. The best alternative is calibre, which is both free and Open Source. Other great apps like KDeasy are Amazon Kindle (Free), Calibre Web (Free, Open Source), Freebook Sifter (Free) and BookFusion (Free).
Calibre is a free and open source e-book library management application made by users, for users. Many languages, designed around the concept of the logical book, i.e., a single entry in your library that may correspond to actual e-book files in several formats.
Amazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and Android-based device. You can discover and read over 630,000 books in the Kindle Store, including the latest bestsellers and new releases.
eBook platform focused on openness that provides e-book library management and reader for users to upload & read their e-books across all devices while also allowing businesses and schools to create their own digital library to distribute content.
Kindlian is a cool add-on for your Kindle. It's a desktop app that allows to view and manage Kindle books and collections. It works on Windows XP/Vista/7/8 and supports Kindle 3, 4, 5, Touch, and Paperwhite. A Mac OS X version is planned, but not yet available.