Calibre is a popular and full-featured ebook management system. Currently its website reports 2.9 million active installs in 237 countries. Calibre is able to create, edit, and read ebooks in many common formats, including EPUB and Kindle MOBI. It can synchronize books across devices and convert between formats (within DRM restrictions). Cailbre can download books from free providers like the Internet Archive and Project Guttenberg. Metadata for ebooks can be integrated from sources like ISBNdb.com, Goodreads, and LibraryThing. It can also download articles from any site that provides an RSS feed. Examples are included to incorporate articles from The Economist, BBC News, Scientific American, and many others. Calibre is available for Windows, macOS, and Linux.