30 open-source projects similar to kovidgoyal/calibre, ranked by shared indexed features. Tags may describe platforms or build tools rather than the same primary purpose. Check each project’s use case, license, and deployment requirements before treating it as a replacement.
This project is a community-curated directory of open-source software designed for deployment in private server environments and home labs. It serves as a comprehensive resource for discovering independent, self-hosted alternatives to mainstream cloud services, enabling users to maintain full data ownership and control over their digital infrastructure. The directory is structured through a hierarchical taxonomy that organizes a vast collection of applications into logical categories, ranging from media management and data analytics to private communication and team productivity tools. It dis
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-web is a self-hosted web application that provides a browser-based interface for browsing, managing, and reading digital book collections stored in a library database. It functions as a comprehensive library management system, allowing users to organize large collections, edit metadata, and perform automated content updates through a centralized administrative dashboard. The platform distinguishes itself by integrating directly with external infrastructure to extend the capabilities of a standard digital library. It supports remote storage mapping to host files on cloud providers, uti
Readest is a comprehensive digital reading platform designed to manage, annotate, and consume electronic books across multiple devices. It functions as a versatile library manager and reading environment, supporting a wide range of user needs from standard ebook consumption to specialized study and accessibility-focused workflows. The platform distinguishes itself through advanced features like parallel text study, which enables side-by-side document rendering with synchronized scrolling, and a robust text-to-speech engine that provides hands-free reading with synchronized visual highlighting
Booklore is a self-hosted e-book manager and digital library platform designed to organize personal collections of e-books and metadata. It functions as a metadata server for indexing book files and synchronizing library states across multiple devices and readers. The project includes a web-based reader for opening EPUB, PDF, and comic files directly in the browser with tools for highlighting, annotating, and tracking reading progress. It features an automated importer that monitors local directories for new files to trigger metadata extraction and fetch covers and descriptions from external
Mihon is a content aggregation client and manga reader application designed to manage digital comic libraries. It provides a centralized interface for organizing personal collections and tracking reading progress across various series. The application distinguishes itself through a modular architecture that supports dynamic extension loading, allowing users to integrate third-party content sources directly into the interface. It enables aggregated content discovery by executing concurrent searches across multiple providers, consolidating results into a unified view. Beyond basic reading, the
Legado is a digital library manager and content aggregator designed to collect, organize, and read text-based media from various online sources within a single mobile interface. It functions as a centralized platform for managing personal collections, supporting both e-book reading and the tracking of updates from multiple digital content providers. The application distinguishes itself through a modular architecture that allows users to import external source definitions, enabling the retrieval of content from diverse web-based providers. It utilizes sandboxed scripting and pattern-based extr
Grav is a flat-file content management system that eliminates the need for a traditional database by storing site content and configuration in human-readable Markdown and YAML files. Built as a modular PHP web framework, it uses a hierarchical page routing system where the physical directory structure directly determines the site's URL paths. The platform is distinguished by its event-driven plugin architecture and a command-line interface that prioritizes system administration, deployment, and maintenance tasks. It utilizes a blueprint-driven system to generate administrative forms from stru
Koodo Reader is an open-source, cross-platform eBook reader designed for managing and studying digital documents. It functions as both a standalone desktop application and a self-hosted web environment, allowing users to organize their libraries and read across multiple devices. The application distinguishes itself through integrated study and annotation tools that facilitate personal knowledge management, enabling users to highlight and extract insights from their documents. It supports a consistent reading experience by synchronizing progress and notes across platforms, while also providing
Marker is a comprehensive document processing platform designed to automate the conversion, extraction, and structuring of data from complex files. It functions as an orchestration engine that chains modular processing steps into versioned, reusable pipelines, allowing organizations to standardize document handling and automate repetitive business tasks at scale. The platform distinguishes itself through its support for secure, private infrastructure deployment, enabling users to run containerized services within their own environments to maintain strict data privacy. It features specialized
Yuedu is an Android application designed to aggregate and manage web-based articles and reading content within a single interface. It functions as a content reader that collects information from various online sources, including RSS feeds, and organizes them for personal consumption. The application distinguishes itself through a plugin-driven architecture that utilizes custom parsing rules to extract and format unstructured web data. This modular approach allows users to define how the application interacts with diverse websites, ensuring that content is transformed into a standardized forma
Pandoc is a universal document converter that translates content between a wide range of markup and binary formats. It functions by parsing input documents into a unified intermediate abstract syntax tree, which serves as the foundation for consistent manipulation and transformation across diverse output types. The system is distinguished by its modular reader-writer pipeline, which decouples input parsing from output generation to allow for granular control over document structure. Users can programmatically manipulate this intermediate tree through a robust filter system, supporting both ex
This project is a web-based collaborative editor and scientific document management system designed for LaTeX. It provides a centralized environment for writing, editing, and compiling academic manuscripts, enabling multiple users to work on the same project simultaneously through real-time synchronization. The platform distinguishes itself by treating documents as version-controlled repositories, allowing for granular history tracking and bidirectional synchronization with external version control systems. It features a secure, containerized compilation pipeline that isolates build processes
Dokploy is a self-hosted platform-as-a-service designed to simplify the deployment and management of containerized applications and databases. It provides a centralized control plane that decouples administrative management from application workloads, allowing users to oversee infrastructure across multiple server nodes through a unified web interface or a command-line tool. The platform distinguishes itself through an extensive library of pre-configured application templates, enabling the rapid deployment of databases, identity providers, and various productivity or development tools. It sup
ConvertX is a web-based file conversion management platform designed to transform documents, images, and video files between various formats. It utilizes system-level binary orchestration to execute conversion tasks, leveraging background worker threads to handle concurrent, high-volume bulk processing without blocking the user interface. The platform distinguishes itself through a comprehensive security and access control framework, which includes multi-user account management, session-based token authentication, and role-based permissions. Users can secure their output files with passwords
FileConverter is a batch processing utility designed to automate file format transformations and system-level file management. It functions as a metadata-aware engine that integrates directly into the operating system shell, allowing users to trigger conversion tasks through the file manager context menu. The tool distinguishes itself by combining format conversion with automated post-processing workflows. Users can define reusable conversion presets to ensure consistent quality and settings across batch operations. Furthermore, the system utilizes metadata from source files to dynamically ge
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
LibreraReader is a multi-format e-book reader and digital library manager designed for mobile and desktop devices. It functions as a customizable document renderer and a text-to-speech document player that converts written text into spoken audio via a configurable speech engine and integrated media player. The project distinguishes itself through a high degree of visual and functional customization, including the ability to inject custom CSS for styling overrides and the use of pluggable rendering engines to balance speed and stability. It includes specialized navigation tools such as a verti
Nuclear is a cross-platform desktop music player that aggregates multiple online audio sources into a single interface. It functions as a streaming music aggregator and a local library manager, allowing users to search for and play audio tracks while maintaining persistent collections and playback queues. The application utilizes a modular architecture that supports custom plugins, enabling users to extend core functionality by adding new streaming sources, metadata providers, and interface features. This design allows for the normalization of disparate audio sources through a unified abstrac
Anki is a cross-platform flashcard management system designed to optimize long-term memory retention through spaced-repetition learning. It functions as a digital learning assistant that uses active recall practice and automated scheduling algorithms to determine the ideal timing for card reviews based on individual performance history. The core system relies on a local relational database to ensure data persistence and portability, while supporting complex study workflows through flexible note-type schema modeling and template-driven content rendering. The platform distinguishes itself throu
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
Suwayomi-Server is a self-hosted manga server that serves content via OPDS feeds for use with compatible reader applications. It functions as a personal manga library server, allowing users to organize, browse, and read manga from any device with offline support and automatic chapter updates. The server distinguishes itself through its extension-based source abstraction, which loads and executes third-party extensions at runtime to fetch content from various providers. It implements a bidirectional sync protocol using timestamped progress markers to reconcile reading positions across multiple
This project is a static site generator designed to function as a personal reading tracker and knowledge base. It provides a structured repository for documenting literary consumption, allowing users to maintain a chronological record of their reading history and personal library collection. The system utilizes markdown-based content storage to ensure that all entries remain portable and easy to version control. By transforming these structured text files into static HTML pages during a build-time process, the tool creates a consistent and searchable archive of read materials, including autho
Cerebro is a desktop application launcher and search interface that provides a minimalist overlay for finding files, launching software, and executing web queries. It functions as a centralized command bar designed for desktop productivity and rapid system navigation. The project features an extensible plugin framework and a modular architecture, allowing third-party add-ons to integrate new tools and capabilities through a standardized API. It also includes a customizable theme engine that enables users to adjust the visual appearance and styles of the workspace interface. The interface sup
Seafile is a self-hosted file synchronization and sharing platform that provides a central server for maintaining file consistency across multiple devices. It functions as a cloud storage management system and a collaborative document suite, integrating tools for real-time teamwork and shared file management. The platform distinguishes itself through a metadata-driven file organizer that uses extensible properties and hierarchical tags instead of traditional folder structures. It includes client-side encrypted storage to protect private data using user-defined passwords before files leave the
This project is a framework for building real-time collaborative rich-text editing environments. It provides a structured, schema-based engine that enforces document integrity while allowing multiple users to modify content simultaneously through synchronized state management and conflict resolution protocols. The editor distinguishes itself through a highly modular plugin architecture that supports the integration of complex, interactive UI components built with external frontend libraries. By utilizing a custom rendering engine and a versioned, immutable document state tree, it enables deve
Elysia is a high-performance TypeScript web framework designed for building type-safe backend services. It provides a modular, plugin-based architecture that allows developers to compose server logic, middleware, and validation schemas into scalable application instances. By leveraging native web standards, the framework ensures portability across diverse JavaScript runtimes, including Node.js, Deno, and various edge computing environments. The framework distinguishes itself through its focus on end-to-end type safety, automatically synchronizing request and response definitions between the s
wewe-rss is an RSS feed generator and scheduled aggregator that converts social media accounts and web content into standardized RSS, Atom, or JSON feeds. It functions as a full-text content extractor, retrieving the complete body of articles rather than short summaries. The system operates as an API-protected feed gateway, utilizing token-based authorization and request rate limiting to restrict access and maintain stability. It supports subscription portability by exporting tracked sources into standardized OPML files. The project manages content aggregation through automated polling via c
NetNewsWire is an RSS feed aggregator and cloud-synced news reader. It provides a centralized interface for collecting, organizing, and consuming articles from multiple web feed formats using an XML feed parser. The application features a local database feed cache to ensure fast retrieval and offline access to content. It includes a customizable theme engine that decouples visual styling from logic, allowing the user interface appearance to be adjusted via configurable parameters. The platform supports cross-device reading synchronization for subscription lists and read markers through remot