If you need to organize your electronic books (e-books) library, Calibre is the software for you. The software also allows you to view your books (in any format they may be) and even convert them from one format to another. The user interface is relatively simple and straightforward and all the various options and features are placed conveniently and are easily accessible. The software supports both drag and drop actions (where you drag an e-book from a folder on your hard drive onto the program’s window) and direct selection actions using the integrated File Browser. A nice option is to add e-books by using their ISBN code. Sorting is simple and effective. You are able to sort your books after author, language, rating, format, series, publisher, and even tags. Metadata can be downloaded from the Internet for all your books, so you can get plenty of nice covers quickly. The software is very good at converting between different types of eBooks. As you know, some readers are unable to open specific formats. You can convert to and from the following formats: EPUB, XML, CSV, MOBI, PDF, DOCX, HTML, ODT, etc. In our testing, the program managed to keep almost all formatting and content intact while performing the conversion. The program can synchronize your books with your mobile devices. The hardware drivers included with the software recognize a wide array of mobile devices (e-readers included, of course).
Another interesting feature is the program’s ability to download news from specific websites using the Fetch News option, and convert the data to an e-book. You can schedule the downloads so that you don’t have to keep an eye on the program. Also, it is possible to customize the sources or download news from all sources simultaneously with one click. You can create libraries of books and perform a wide variety of actions on them: copy, delete, rename and even restore. You are able to connect to iTunes and sync your libraries.
On the down side, the software consumes quite a lot of resources when running. However, all modern computers should be able to run it. Also, the software was stable in our tests and did not freeze or crash under any circumstances.
All in all, Calibre is a very good alternative to Sigil or Kindle. It comes with a lot of useful features, it can convert from and to a lot of e-book formats, and is also completely free to download and use.