Open Source Software Library

A Python server implementation of modern Open Geospatial Consortium API standards.

A geospatial content management platform for publishing, sharing, and collaborating on maps and spatial data.

A self-hosted collaboration platform for files, calendars, contacts, communication, and productivity.

A file synchronization and sharing platform for private cloud deployments.

A high-performance file synchronization and sharing system with team collaboration features.

A continuous peer-to-peer file synchronization application that keeps data under user control.

A desktop and mobile tool that encrypts files before they are stored in cloud services.

A disk encryption application for creating encrypted volumes and protecting stored data.

A secure browser-based video conferencing platform that can be self-hosted.

A federated homeserver for the Matrix open communication protocol.

A web client for secure, decentralized Matrix messaging and collaboration.

A team chat system that organizes conversations by topic within streams.

A self-hosted communications platform for chat, voice, video, and customer engagement.

A low-latency encrypted voice chat application suitable for communities and gaming.

A desktop email, calendar, contacts, and feed client maintained by the Thunderbird community.

An open email client for Android that forms the foundation of Thunderbird for Android.

A modern community discussion platform with moderation, trust levels, and extensive integrations.

A lightweight and extensible discussion forum platform built with PHP.

A modular social network framework for communities, organizations, and intranets.

A decentralized social networking server built on the ActivityPub standard.

A federated video hosting platform using peer-to-peer delivery and ActivityPub.

A federated photo-sharing platform designed as an open alternative to centralized social networks.

A minimalist federated publishing platform for blogs and writing communities.

A publishing platform for professional websites, newsletters, and membership-based content.

A widely used content management system for websites, blogs, and online publishing.

A flexible content management framework for complex websites and digital experiences.

A general-purpose content management system with multilingual and extensibility features.

A fast flat-file content management system that does not require a database.

An enterprise content management system for multilingual and multi-site web platforms.

A headless content management system for building customizable content APIs.

A data platform that adds APIs and an administration interface to SQL databases.

A content management system built on Django for editorially focused websites.

A fast static site generator for documentation, blogs, and websites.

A static site generator with strong support for blogs and Git-based publishing.

A documentation site generator based on Markdown and configurable themes.

A self-hosted documentation and knowledge-base platform organized into books, chapters, and pages.

A modern wiki platform with authentication, search, localization, and storage integrations.

A simple wiki system that stores pages in files and requires no database.

The wiki software that powers Wikipedia and many collaborative knowledge sites.

A collaborative knowledge base and team wiki with a clean editing experience.

A learning management system for delivering online courses, assessments, and educational activities.

A learning management system focused on accessible online training and education.

A comprehensive learning management platform for courses, testing, and collaboration.

A learning management system for course delivery, assignments, grading, and communication.

A framework for creating reusable interactive learning content in browsers.

An offline-first learning platform designed for communities with limited internet access.

A collection of educational activities for children covering computing, mathematics, science, and literacy.

A spaced-repetition flashcard application for efficient long-term learning.

A web-based survey platform for designing questionnaires and collecting responses.

A data collection platform for surveys and field research, including offline workflows.

A server for managing mobile and offline data collection with Open Data Kit.

An enterprise resource planning system covering accounting, inventory, sales, manufacturing, and human resources.

A modular business application suite for CRM, accounting, inventory, websites, and operations.

A web-based ERP and CRM suite for small organizations and independent professionals.

A customer relationship management platform for sales, service, and marketing teams.

A lightweight web CRM for managing leads, contacts, opportunities, and business processes.

A marketing automation platform for campaigns, contact management, email, and analytics.

An invoicing and billing platform for freelancers and small businesses.

A web-based accounting platform for small businesses and freelancers.

A desktop accounting application for personal and small-business finances.

A personal finance application for tracking accounts, budgets, and spending.

A self-hosted personal finance manager for budgets, transactions, and financial reports.

A project management platform for planning, agile work, time tracking, and team collaboration.

An agile project management platform supporting Scrum and Kanban workflows.

A flexible project and issue tracking application with wikis and time tracking.

A modern issue tracking and product planning platform for software teams.

A project management system combining tasks, goals, strategy, and team collaboration.

A minimalist Kanban project management application for task and workflow tracking.

A self-hosted collaborative Kanban board for organizing tasks and workflows.

A self-hosted task and project management application with lists, boards, and calendars.

A note-taking and to-do application with Markdown, encryption, and synchronization.

A privacy-focused notes application with end-to-end encryption and cross-device synchronization.

A local-first knowledge management and outlining application for connected notes.

A Markdown editor for academic writing, note-taking, and citation workflows.

A desktop office suite for editing documents, spreadsheets, presentations, forms, and PDF files.

A browser-based collaborative office suite based on LibreOffice technology.

A desktop publishing application for professional page layout and print production.

A vector graphics editor for illustrations, diagrams, logos, and print design.

An image editor for photo retouching, composition, drawing, and graphic design.

A professional digital painting and illustration application.

A complete 3D creation suite for modelling, animation, rendering, compositing, and video editing.

A parametric 3D CAD application for engineering and product design.

An electronic design automation suite for schematics and printed circuit boards.

An application for creating electrical diagrams and technical schematics.

An interior design application for arranging furniture and previewing homes in 3D.

A lightweight hand-drawn 2D animation application supporting bitmap and vector workflows.

A vector-based 2D animation application for producing film-quality animation.

A non-linear video editor for multi-track editing, effects, and professional media workflows.

A cross-platform video editor supporting many formats, filters, and capture workflows.

A live streaming and screen recording application for broadcasts, presentations, and content creation.

An audio editor and recorder for podcasts, music, restoration, and sound production.

A digital audio workstation for recording, editing, mixing, and mastering audio.

A music production workstation for composing, sequencing, synthesizing, and mixing.

A music notation application for composing, arranging, playing, and printing scores.

A versatile media player and streaming application supporting a very broad range of formats.

A lightweight command-line and graphical media player with high-quality video output.

A self-hosted media server for organizing and streaming personal movies, television, and music.

A lightweight self-hosted music server compatible with Subsonic clients.

An ebook library manager for organizing, converting, reading, and transferring digital books.

A self-hosted digital library server for comics, manga, and ebooks.