You will be able to organize your collection on author, publication date or publisher among others.
One of the most interesting functions lets you convert between eBook formats, transform a newsfeed to an eBook or synchronize the eBooks with an external device.
It supports all kinds of formats, both reading and conversion, from the most established ones like ePub, PDF, txt, or RTF to the export to fb2, OEB or MOBI.
Another one of its most valued features is the possibility to synchronize your books with your eBook reader, be it an Amazon Kindle or other models like Papyre, Cybook or the Sony PRS.
Calibre uses an interface in the style of Cover Flow to navigate through the covers of the books. It also lets you edit its metadata from the own interface of the program and explore the collection of eBooks from a web browser.