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📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail

The most scalable and reliable MQTT broker for AI, IoT, IIoT and connected vehicles

Simple forum software for building great communities.

Smart PVR for newsgroup and bittorrent users.

OpenProject is the leading open source project management software for product, project and portfolio management. A powerful Jira alternative with agile planning, issue tracking, roadmaps, Gantt charts, time tracking, collaboration features, and more. Available on premises or in the cloud. ⭐ Star us on GitHub

A free, self-hostable news aggregator…

A simple server for sending and receiving messages in real-time per WebSocket. (Includes a sleek web-ui)

Easy and fast file sharing from the command-line.

The Privacy First PDF Toolkit

music library manager and MusicBrainz tagger

Open Source Platform for DTC, B2B Commerce, Marketplaces & Omnichannel. REST APIs, TypeScript SDKs, and production-ready Next.js storefront. Self-host it. Own your data. No vendor lock-in. Zero platform fees.

A Q&A platform software for teams at any scales. Whether it's a community forum, help center, or knowledge management platform, you can always count on Apache Answer.

Self-hosted, plugin-based server management.

Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.

The Open Source DocuSign Alternative.

ActivityPub-federated video streaming platform using P2P directly in your web browser

JupyterLab computational environment.

Beyond file syncing and sharing, a new way to organize your files with extensible file properties and flexible views

Official Transmission BitTorrent client repository

The Unified and Autonomous Development Platform

Node.js based forum software built for the modern web

Style and Grammar Checker for 25+ Languages

Self-hosted video downloader for YouTube and other sites (web UI for yt-dlp)

:file_folder: Universal File Storage Client

All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

🐀 A decentralised discussion platform for communities.

Database governance built for humans and agents — controlling changes and access across every major database.

Movie organizer/manager for usenet and torrent users.

Self-hosted audiobook and podcast server

QloApps is a Free and Open-source hotel management and reservation system to take a hotel business online. QloApps offers a Property Management System (PMS), a Booking Engine, and an attractive Hotel Website. Elevate hotel operations with QloApps to streamline processes and provide an enhanced experience for both hoteliers and guests.