Open-source alternatives to Foliate

Reader is a Win32 text reader and EPUB document viewer for Windows. It functions as an auto-scrolling text viewer and a web novel downloader that renders digital books and plain text using various character encodings. The application includes a text-based content filter to remove advertisements and irrelevant text from web sources using regular expressions. It provides hands-free reading capabilities through automated page-turning and scrolling modes governed by custom time intervals. The software manages digital book organization through reading progress tracking, bookmark management, and t

anx-reader is a cross-platform e-book reader and cloud-synced library manager. It renders various electronic book formats into a standardized HTML view with customizable themes and fonts for a consistent experience across different operating systems. The project integrates a large language model as a reading assistant to summarize text and answer questions about book content. It also functions as a digital annotation tool for creating color-coded highlights and detailed notes for external research export. The system includes capabilities for organizing digital library collections, synchroniz

BookReader is a mobile e-book reader application designed for reading digital novels in EPUB, PDF, and TXT formats. It functions as a digital library manager for organizing, indexing, and searching collections of electronic books using titles and tags. The application features a reading interface with three-dimensional page-flip animations to simulate the feel of physical books. It also includes a wireless synchronization system for transferring digital book files between devices over a local network. The software provides tools for customizing the reading experience, including adjustable th

o-lib is a digital library client for browsing, searching, and downloading publications from remote server subscriptions. It serves as a desktop application that combines remote resource access with a local content organizer to track reading progress and manage favorite titles. The system manages connections to multiple server lines via manual imports or structured subscription lists and uses concurrent speed testing to verify latency and throughput. It includes a multi-threaded download manager that utilizes byte-range offsets to resume interrupted transfers. The application provides tools

GoldenDict-ng is a multi-source dictionary application and offline dictionary reader that enables users to search for word definitions across local files, DICT servers, and web sources in a single interface. It functions as a web-based definition browser, rendering entries using a browser engine to support HTML, CSS, and JavaScript for rich content presentation. The project distinguishes itself by integrating with Anki flashcard systems to facilitate language learning workflows and offering specialized translation tools that support clipboard monitoring and character set conversion. It also p

Copymanga is a mobile manga reader application designed for browsing, reading, and downloading manga content from remote web sources. It functions as a manga library manager that allows users to organize favorite series and track their reading progress. The application includes a cross-device synchronization client that maintains user identity, preferences, and reading history across multiple devices via cloud storage. It also operates as an offline downloader, saving manga chapters as compressed image files to local storage for consumption without an internet connection. The platform covers

Komikku is a manga reader application and digital comic library manager. It functions as a content aggregation client that combines feeds and saved searches from multiple third-party extensions into a unified view, while providing a mobile interface for reading digital comics from online sources or local storage. The application integrates third-party source extensions to fetch content from various catalogs and includes a system to synchronize reading status and progress records with external tracking services. It also allows for content source migration to maintain library access when a spec

PyMuPDF is a comprehensive PDF manipulation library and document analysis tool. It serves as a text extraction tool, OCR engine, and image converter, providing a programmatic interface to edit, merge, split, and optimize PDF and Office documents. The project distinguishes itself through high-performance capabilities, including the use of C-bindings for low-level manipulation and parallelized page processing to accelerate workloads. It provides specialized conversion paths, such as transforming PDF content into Markdown for retrieval-augmented generation and large language model pipelines. It

TagSpaces is an offline-first file tagging and organization platform that lets you manage local files with portable metadata stored directly in filenames or sidecar JSON files, eliminating the need for a central database. It functions as a full-text file search engine, a Kanban board file organizer, a local AI file assistant, an S3-compatible cloud file manager, and a web clipper and bookmark manager, all within a single application. The project distinguishes itself through a local-first architecture where all file operations, indexing, and AI processing run entirely on the device, with cloud

Sigil is a multi-platform ebook authoring suite and EPUB editor designed for creating, modifying, and structuring electronic publications. It serves as a digital publication tool for managing metadata and generating tables of contents for digital books. The software functions as an EPUB validator, checking ebook files for syntax errors and compliance with industry standards to ensure valid rendering. It also supports an extensible workspace where custom automation scripts can be used to add specialized capabilities. The suite covers digital content structuring and publication editing, provid

Calibre is a comprehensive suite for digital library management, serving as a centralized hub for organizing, converting, and editing e-book collections. It functions as a multi-purpose platform that combines a relational database for metadata tracking with a powerful processing engine capable of transforming document formats and restructuring internal markup. Beyond local management, the software acts as a content server, enabling users to host their libraries over a network for remote access and reading via standard web browsers. The project distinguishes itself through its deep extensibili

This project is a configuration-driven typesetting system and template framework for academic theses and research papers. It serves as a multilingual layout engine designed to automate the production of scientific manuscripts and technical documents according to institutional formatting standards. The system abstracts complex LaTeX logic into simplified configuration files to manage institutional metadata, front matter, and university-specific layout requirements. It ensures typographic consistency across different operating systems through cross-platform font mapping and a standardized build

Readest is a cross-platform digital book reader and library management system designed to render multi-format ebook files across different devices. It provides a consistent interface for viewing digital content while coordinating reading progress, bookmarks, and notes through synchronization services. The application includes specialized tools for technical and academic reading, such as code syntax highlighting, a virtual split-screen viewport for comparing documents, and full-text search for rapid information retrieval. It further extends the reading experience with integrated dictionary loo

This project is a technical text renderer designed to display complex mathematical notation and syntax-highlighted code within digital document formats. It functions as a MathML technical renderer and a system for producing static site generated documentation. The project creates digital textbooks available as both HTML5 digital books and standardized EPUB3 eBooks. It transforms source materials into pre-rendered HTML and EPUB files, ensuring the content is compatible with modern web browsers and electronic book readers. The rendering surface utilizes a responsive layout with viewport adapta

This project provides a containerized self-hosted web interface and server for browsing, reading, and managing digital book collections over a local network. It serves a full desktop application capability entirely through a lightweight browser-based network interface, maintaining library integrity and metadata state by mounting external database files directly into the container volume. The application enables users to search, filter, and read digital book collections stored in a database, transform documents between different publication formats using integrated conversion tools, and modif

Reader3 is a self-hosted ebook reader designed for LLM-assisted reading and digital library management. It provides a private web interface for viewing and managing digital book files stored on a local machine. The system integrates a reading flow with large language models to analyze, summarize, and discuss digital books. It supports collaborative document analysis by reading long-form texts in a structured manner to extract information for AI processing. The project includes capabilities for managing a local library by indexing files in a specific directory and serving content through a st

turn.js is an HTML5 page flip library and digital book viewer used to render documents as interactive books. It simulates realistic book page-turning effects for web content and provides a navigation interface for flipping through pages via mouse clicks or touch gestures. The library supports both single and double page layouts and can synchronize the current page position with browser navigation history. It allows for the dynamic loading of page content and the ability to manage book pages by adding or removing individual sections. Capability areas include content magnification through zoom

Gosub-engine is an HTML5 browser engine and web rendering pipeline that parses HTML5 and CSS3 to compute layout and render web content to pixels. It functions as a JavaScript runtime environment with a virtual machine and event loop for handling dynamic logic and asynchronous tasks. The system also includes a web storage manager for persisting cookies, local storage, and session storage. The project features a headless browser renderer capable of generating page images or extracting plain text without a visible window. It supports cross-platform graphics rendering through pluggable CPU and GP

SumatraPDF is a lightweight, multi-format document viewer designed for rendering PDF, eBook, and comic book files within a unified interface. It functions as both a graphical reading environment and a command-line document processor, enabling users to automate file conversion, merging, and extraction tasks without requiring a graphical interface. The application distinguishes itself through a single-executable binary distribution that utilizes direct-to-GDI rendering and memory-mapped file access to maintain high performance and minimal memory overhead. Users can personalize their workspace b

RmlUi is a cross-platform UI renderer and middleware library that enables the creation of user interfaces using a subset of HTML and CSS. It functions as a rendering-agnostic layer designed to integrate web-standard layout and styling into custom game engines and embedded applications. The framework is distinguished by its integration of Lua for dynamic logic and control, as well as a specialized toolkit for rendering SVG images and Lottie animations. It utilizes a pluggable rendering backend that decouples geometry generation from the final display, allowing it to generate textured geometry

Kraken is a cross-platform UI framework and web standards runtime designed to build native applications using standard web markup and styling. It utilizes a Flutter-based rendering engine to process HTML and CSS, producing visually consistent user interfaces across mobile and desktop platforms. The system distinguishes itself by compiling the runtime to machine code and employing a synchronous rasterization pipeline to ensure animations and scrolling match the fluidity of native applications. It further integrates high-performance native components directly into a web-standard document object

EverythingPowerToys is a high-performance file and folder search tool for Windows that functions as a system-wide file indexer. It provides near-instant retrieval of files and directories across local storage using a centralized interface and a high-performance indexing engine. The utility specializes in advanced file querying by supporting regular expression patterns to locate files based on complex naming schemes. It also resolves system environment variables within search queries to find files in dynamic directory paths. The project covers a broad range of file management and search capab

fsearch is a high-performance desktop file search tool and filesystem indexing engine. It provides near-instant location of files and folders on a local filesystem by utilizing a background indexing system that monitors filesystem changes in real time. The utility distinguishes itself through advanced query capabilities, including support for boolean search logic using AND, OR, and NOT operators, as well as regular expression and wildcard filtering. It allows for precise result refinement using literal character handling and specific search modifiers such as case sensitivity and exact matches

PhotoEditor is an image editing library and canvas-based photo editor designed for in-app image manipulation. It serves as a toolkit for applying filters, text, stickers, and freehand drawing to images, functioning as both a bitmap image processor and a digital photo annotation tool. The project enables the creation of social media style stories by allowing users to add emojis, text, and stickers to photos. It supports non-destructive image manipulation, allowing users to remove elements or revert changes before exporting the final composition. The library covers a broad range of capabilitie

Cimoc is a manga reader application and cross-platform ebook viewer designed for reading digital comics and image-based documents. It functions as both an online content aggregator and an offline media library, supporting the display of media from local files and remote web sources. The application integrates various web providers through a custom parser system to fetch and display online content. It includes a synchronization system to save application settings and reading progress to a remote server, maintaining consistency across different devices. Users can customize their reading experi

Photon is a cross-platform desktop framework and UI development kit designed for building software that runs on multiple operating systems. It functions as an application framework for creating desktop software using a web-based frontend. The project focuses on the design of cross-platform graphical user interfaces, specifically for applications developed with Electron. It provides tools for building web-based desktop interfaces and polished layouts using HTML and CSS.

DankMaterialShell is a complete Wayland desktop environment that provides a unified set of panels, widgets, system tray, notifications, and an application launcher out of the box. It is built on a plugin-based shell architecture that allows for extending the desktop with custom widgets, launcher items, and background services through a unified component interface. The shell renders its panels, widgets, and overlays using the Wayland layer shell protocol for compositor-agnostic desktop integration. The project distinguishes itself through several integrated capabilities that work together as a