If you have many e-books on your computer, you know your collection can become as cluttered as any unkempt bookshelf.

Calibre is a free download that can organize and update your e-book library like a digital librarian. It has a clean, user-friendly interface and a ton of helpful features.

Calibre can communicate with almost any e-reader, and can convert your books to virtually any format. You can customize each book's cover and data automatically by syncing with online booksellers.

Downloading magazines and newspapers is easy to schedule using Calibre. You'll also be able to buy new e-books. Calibre compares prices from most of the major e-book sites.

Note: Calibre cannot convert e-books that use copy protection. That means it won't work with some purchased e-books or with e-books you download from the library.

Cost: Free

Link: calibre-ebook.com

System: Windows XP, Vista, 7, Mac OS X