calibre: calibre (the one stop solution to all you ebook needs) calibre: calibre: Calibre is a free and open source e-book library management calibre: application developed by users of e-books for users of e-books. It has calibre: a cornucopia of features divided into the following main categories: calibre: Library Management, e-book conversion, syncing to e-book reader calibre: devices, downloading news from the web and converting it into e-book calibre: form, comprehensive e-book viewer, content server for online access to calibre: your book collection. calibre: calibre: