Open Source Software Library

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.