theLibrarian is described as 'Easy to use yet powerful application for cataloguing, organizing and managing your collections of books, comics or other kind of documents such as scientific articles, magazines and so on' and is a eBook Reader in the News & Books category. There are more than 10 alternatives to theLibrarian for a variety of platforms, including Windows, Mac, Online / Web-based, Android and iPhone. The best alternative is calibre, which is both free and Open Source. Other great apps like theLibrarian are Apple Books (Free), Alfa eBooks Manager (Freemium), Read Books and Audiobooks (Free) and Kavita (Free, Open Source).
Calibre is a free and open source e-book library management application made by users, for users. Many languages, designed around the concept of the logical book, i.e., a single entry in your library that may correspond to actual e-book files in several formats.
Apple Books is the single destination for all the books you love, and the ones you’re about to. Browse the Book Store, join Oprah’s new Book Club, keep track of what you’ve read and want to read, and listen to enthralling audiobooks. All in one place.
One of the best ways to learn a new language is by reading books in it. But this can get very tedious, as you frequently need to switch between the dictionary and the book you're reading. Duofolio's purpose is to make that experience a little bit easier.
ICE Book Reader Professional is the ultimate e-book reader. It can be used is as a teleprompter too. It includes native support for .LIT, .CHM and .ePub files, and does not utilize any Microsoft Reader or Microsoft HELP components.