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.