Top Alternatives to FBReader

Sumatra PDF is a free and lightweight PDF reader for Windows, renowned for its speed and minimalist interface. Beyond PDF, it supports a variety of other formats including EPUB, MOBI, CBR, CBZ, XPS, and DjVu, making it a versatile e-reader.

Calibre is a powerful and versatile open-source e-book management software that streamlines the organization, conversion, and reading of your digital book collection across various formats and devices.

Amazon Kindle offers a comprehensive ecosystem for reading digital books, providing dedicated e-readers and cross-platform apps. It allows users to purchase, download, and read a vast selection of ebooks, newspapers, and magazines, synced across various devices for seamless access.

Okular is a versatile document viewer from the KDE community, supporting a wide array of file formats including PDF, EPUB, DjVu, and TIFF. It offers intuitive navigation, robust annotation tools, and features like text selection and saving, making it a powerful tool for handling diverse document types.

STDU Viewer is a versatile, lightweight document viewer supporting a wide array of file formats including PDF, DjVu, Comics Book Archive (CBR/CBZ), XPS, TIFF, and text files. It features a tabbed interface, low memory usage, and optional portability, making it an efficient choice for managing and reading various document types.

Apple Books (formerly iBooks) is Apple's native e-book and audiobook application for iOS and macOS devices, providing a seamless reading and listening experience with robust library management and sync features.

Cool Reader is a highly configurable and lightweight eBook viewer designed for comfortable reading on various devices. It supports multiple formats including EPUB and DOCBOOK, offers extensive customization options for interface and reading experience, and includes useful features like library management, annotations, and sync capabilities.

Aldiko is a versatile e-book reader for Android and iOS, supporting a wide range of formats including EPUB and PDF. It offers a rich reading experience with customizable settings, library management, annotation tools, and synchronization options.

Scribd is a comprehensive digital library offering a vast collection of ebooks, audiobooks, podcasts, magazines, and sheet music, all available through a single subscription. It provides diverse content for various interests and learning needs.

Moon+ Reader is a highly customizable and feature-rich ebook reader for Android devices, supporting a wide range of ebook formats and offering advanced options for reading comfort and library management.

GoodReader is a powerful document reader and file manager for iOS, excelling in handling large PDF files, annotations, and secure cloud integration, ideal for professionals and students needing robust document management on the go.

EPUBReader is a lightweight and efficient browser extension that allows users to open and read EPUB e-books directly within their web browser. It provides a simple and intuitive reading experience without requiring external software.

AlReader is a highly customizable and feature-rich e-book reader application designed for mobile devices. It supports a wide range of formats, offers extensive configuration options for reading interface, and includes features like text-to-speech, library management, and synchronization.

Universal Viewer is a portable file viewer capable of displaying a wide array of file formats, including documents, images, media, and raw files, without requiring the associated native applications.

ICE Book Reader Professional is a highly customizable e-book reader and teleprompter with a focus on performance and comfort. It supports a wide range of formats and offers advanced features for managing and reading your digital library.

Albite READER is a free ebook reader for Java-enabled mobile phones, providing a customizable reading experience with offline access to your digital library. It supports various ebook formats and includes features like night mode, bookmarks, and library management for a convenient reading experience on older mobile devices.

Document Viewer is a highly customizable and lightweight document viewer designed for Android devices. It supports a wide range of formats including PDF, DjVu, XPS, CBZ, CBR, and ePub, offering features like highlighting, annotation, and optimal performance.

NOOK is a comprehensive digital reading application developed by Barnes & Noble, providing access to a vast library of ebooks, magazines, and newspapers. It offers a user-friendly interface for reading on various devices and includes features like customization, annotations, and cross-device synchronization.