Top Alternatives to Amazon Kindle

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.

Project Gutenberg is a pioneering initiative offering free access to a vast library of digitized public domain books. It is a worldwide volunteer effort archiving cultural works for the benefit of all.

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.

Polar is a powerful desktop application designed to serve as an integrated reading environment. It allows users to actively read, annotate PDFs and web pages, create flashcards for spaced repetition learning, organize their digital library, and track their reading and learning progress. It's built for focused and deep engagement with digital content.

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.

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.