Samenwerkingsplatforms

Mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration.

Realtime collaborative markdown notes on all platforms, formerly known as CodiMD and HackMD CE.

File storage, syncing, sharing, and collaboration with real-time editing, permission management, and desktop/CLI clients.

Bookmark and archive manager to store your useful links.

SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface.

Communications platform that puts data protection first (alternative to Gitter.im and Slack).

Zulip is a powerful, open source group chat application.

File sharing + sync, notes, and photos (alternative to Nextcloud and ownCloud's RSS reader).

Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab (alternative to Slack).

Access and share your files, calendars, contacts, mail and [more](https://apps.nextcloud.com/) from any device, on your terms.

Self-hosted project management • Customizable boards • Cross-project workload and flow analytics • Calendar/Agenda • Sticky-note wall • Imports/Backups • Email notifications • MCP/Agent automation

Self-hosted collaborative workspace for Typst.

Collaboration suite with real-time messaging, rich text pages, file management, and dynamic databases - built for offline work (alternative to Slack, Notion).

A private, p2p alternative to Slack and Discord built on Tor & IPFS

Peer-to-peer, editor-agnostic collaborative editing of local text files.

AI-native design editor. Open-source Figma alternative.

The ultimate list of which programs support Vim-like keybindings natively, or how they can be added with extensions. A collaborative project.

A self-hosted workspace where people and coding agents work together across projects, sessions, and providers.

Dradis Framework: Collaboration and reporting for IT Security teams

PartyKit, for Workers

excalidraw with collaboration feature, self-hosting, and only one-click deploy

Library for building distributed, real-time collaborative web applications

The Secure CommsOS™ for mission-critical operations

Free4Chat provides the temporary boundary. Participants bring the capabilities.

100% open source file storage, sharing, and collaboration

Open-source secret & environment management. Secure, simple, collaborative. CLI & Github Sync

Software suite including calendars, address books, notepad, project management tools, client relationship management tools (CRM), knowledge management tools, a wiki and a CMS.

Python Exploitation Framework, V8 Engine Debugger, Proxy interceptor, marketplace, post-exploitation, backdoor generator,....

Interactive whiteboard/wallpaper for the classroom, in person or remotely (documentation in French).

A set of simple tools to accompany the animation of courses in person or remotely. (documentation in French).

Groupware including email, calendar/scheduling, address books, forums, mailing lists, IM, wiki and blog engines, RSS aggregation and more.

Personal cloud where you can manage and sync your files, notes, contacts, passwords, and documents.

Email, calendar, collaboration server with Web interface and lots of integrations.

Shared data types for building collaborative software

File hosting and sharing solution primary for teams and organizations.

Share and collaborate by syncing with any Git repository instantly. Linux, macOS, and Windows

Textbus 是一个组件化的、数据驱动的富文本框架，支持在线协同编辑，拥有非常好的扩展性和可定制性，可使用 Viewfly、Vue 或 React 直接渲染富文本，是构建复杂富文本的不二之选！

A collaborative drawing program

A reversing plugin for cross-decompiler collaboration, built on git.

LinShare - Secure File Sharing

Open Source Discussions Platform for Remote Teams

Collaborative, local-first GTK text editor

ONLYOFFICE DocSpace is a room-based collaborative platform which allows organizing a clear file structure depending on users' needs or project goals. Flexible access permissions and user roles allow fine-tuning the access to the whole space or separate rooms.

Create a virtual game room around a connected buzzer (documentation in French).

An online self-hosted application for creating collaborative digital notepads (Documentation in french).

Create collaborative surveys, quizzes, brainstorms, and word clouds (documentation in French).

Create multimedia collaborative walls for in-person or remote work (documentation in French).

Software for digital collaboration in companies and organizations. From powerful groupware functionalities to clever add-ons, tine combines everything to make daily team collaboration easier.

📑 Collaborative document editing using Markdown

Self hosted web based collaborative video review tool

Share coding agents with your team on phone and desktop

A workspace where people and multiple AI agents work together.

Open-source, self-hosted workspace with installable tools. Mail, boards, docs, chat, todos, files, calendar, and video rooms. Deploy with ONCE, Kamal, or Docker.

Video conferencing, instant messaging, whiteboard, collaborative document editing and other groupware tools using API functions of the Red5 Streaming Server for Remoting and Streaming.

The AI Org-OS — a collaborative platform for humans and agents. Explore: https://spaces.xyne.ai

Webapp for collaborative online retrospectives

Local-first collaboration SDK for React, Vue, and Svelte. Batteries-included: Rich text, undo/redo, cursors, and presence.

Real-time pair programming and collaborative editing for Neovim, inspired by VS Code Live Share.

CodiMD - Realtime collaborative markdown notes on all platforms.

🧩 Content editing tech stack for the web - BlockSuite is a toolkit for building editors and collaborative applications.

A document management and version control plugin that allows teams of any size to collaboratively edit files and manage their workflow.

VS Code collaboration extension - a peer-to-peer and open-source alternative to Live Share.

Shared intelligence layer for organizations

Architecture decision record (ADR) examples for software planning, IT leadership, and template documentation

Official Zulip terminal client.

Realtime infrastructure for multiplayer apps and agents

Open Collaboration Tools: live-sharing solution for Eclipse Theia, VS Code and other editors and IDEs

Weave.js is an open source library to build real-time collaboration applications like whiteboards, diagram editors, etc. on HTML5 Canvas with your own UI

Plugin for Anki SRS designed to facilitate cooperation on creation of notes and decks.

Twake is a secure open source collaboration platform to improve organizational productivity.

A Beginner's Guide to Contributing in an Open Source Project.

Official Extensions for DevGlobe. Show up on a 3D globe in real time while you code, with automatic time tracking and coding metrics.

Self-hosted shared workspace for communities — live collaboration on tasks, documents, calendars, dashboards and more in one place. Project management that starts simple and grows with you.

🚎 Notebook sharing hub

Virtual Office gives you transparency on what Zoom.us rooms are currently occupied and who is present

AI-powered development workspaces with reusable components, architectural clarity and zero overhead.

Renku provides a platform and tools for reproducible and collaborative data analysis.

Open-source Frame.io alternative

HydroShare is a collaborative website for better access to data and models in the hydrologic sciences.

A real-time collaborative code editor featuring unique room generation, syntax highlighting, and auto-suggestions. Users can seamlessly edit, save, and download files while communicating through group chat

Collaborative Platform for team collaboration: file,threads,notes,agenda,etc.

Enterprise Jupyter notebook sharing and collaboration app

PartyKit simplifies developing multiplayer applications

A private Lumina server for IDA Pro

Cross-platform real-time collaboration client optimized for business and organizations.

OceanBase Developer Center(ODC), An open-source, enterprise-grade database tool for collaborative development

基于频道模式的团队沟通协作+轻量级任务看板，支持mardown、富文本、在线表格和思维导图的团队博文wiki，i18n国际化翻译管理的响应式web开源团队协作系统。

AI made blood management social app (Android only)

A curated list of Integrated Development Environments (IDEs) and related tools that can enhance your coding experience and boost your productivity.

Real-time collaborative development from the comfort of your favorite tools

AI Chat / Search / Notes / Collaboration / Channels / Cloud Drive, all in one place! - Collaborative AI Platform.

Incredible drastically simplifies creation of developer video content. It offers a unified workflow to storyboard, record, collaborate and produce the video.

📘 VS Code extension for managing and sharing code snippets, notes and interactive samples using GitHub Gists

Kanwas — Shared context board for teams and agents

Ways of Working (WOW) has 100+ tips for teamwork, including principles, values, tenets, ground rules, aspirations, norms, agreements, expectations, understandings, and more.

json-joy is a library that implements cutting-edge real-time and collaborative editing algorithms and utilities for JSON data models, with a focus on developing the JSON CRDT (Conflict-free Replicated Data Type) specification and implementation.

Open source video conferencing system for tutors.

A web based file manager,web IDE / browser based code editor

[LEGACY] CROSS † CHANNEL 中文化 (汉化) 项目，源代码以及网站。（全翻译文本、全平台移植源码已公开！欢迎修改&学习！）CROSS † CHANNEL Chinese Localization Project, source codes and websites. (All translations and scripts are open, welcome on any improvements!)

Focalboard is an open source, self-hosted alternative to Trello, Notion, and Asana.

The Grass Computing Platform

A website about french words for computer concepts.

Data science environments, for collaboration. ✨

Lightweight Google-searchable Slack alternative for Communities

Shared inboxes for human + AI teams Route the work, automate it, integrate it with anything, and hand it to a person or an AI teammate who sees it through. Refined over 24 years, with a built-in harness for AI teammates -- each with its own mix of knowledge, skills, and tools.

General purpose plain text editor for macOS. Widely known for its live collaboration feature.

Elixir implementation of Delta, the JSON format for describing rich-text content and their changes

Secure AI conversations with documents, video, audio, and more. Personal workspaces for focused context, group spaces for shared insight. Classify docs, reuse prompts, and extend with modular features.

A Swift-native, cross-platform framework for building OpenUSD applications.

A blockchain-based workflow tool for efficient and transparent project management

SyncedStore CRDT is an easy-to-use library for building live, collaborative applications that sync automatically.

Open source asynchronous video communication

SuperViz provides powerful SDKs and APIs that enable developers to easily integrate real-time features into web applications. Our platform accelerates development across various industries with robust, scalable infrastructure and a low-code approach.

Meet OfficeHub — your all-in-one workspace for seamless productivity. Whether you’re drafting documents, crunching numbers in spreadsheets, or mapping out ideas with mind maps, OfficeHub brings every tool you need under one intuitive roof.

Wireflow - user flow chart real-time collaborative tool

Chat with your team while you collaborate over code using VS Live Share

A reverse engineering of Linear's sync engine.

Typing in Tandem. Decentralized, cross-editor, collaborative text-editing!

This open source repository contains collection of games build on basic tech stacks in web development . Use your creativity and build your own game and contribute to the repository by making PR 🎮

Your visual bookmark manager

ChatGPT加持的，多人在线协同信息安全报告编写平台。目前支持的报告类型：渗透测试报告，APP隐私合规报告。

:sparkles: Python library and CLI to upload photo and video on Instagram. W/o a phone!

slatejs collaborative plugin & microservice https://slate-collaborative.herokuapp.com/

Opinionated RiotJS Style Guide for teams.

多人实时富文本 编辑器，可以嵌入各种应用中。支持markdown语法。

SwellRT main project. Server, JavaScript and Java clients

Open Source IDE plugin for distributed collaborative software development

a scalable collaborative document editor with CRDT, P2P and E2EE

Adds collaborative editing capabilities to the Monaco Editor

Build real-time collaborative DApps on top of IPFS

A compatible .Net implementation of the Yjs CRDT framework.

Collaborative text editor (like Google Docs or CoderPad) with integrated semi-anonymizing voice chat intended to help reduce bias in technical communication.

🕺Fast Integrated Development Environment 😻

Pixel Art Together is a multiplayer pixel art editor powered by Liveblocks.

Memory Hole is a support issue organizer application

Scan, index, and archive all of your paper documents (acquired by Mayan EDMS)

Privacy-first, end-to-end encrypted Mail, Pages, Drive, and Calendar.

A mini book about collaborating on GitHub

a Restful Api test tool

A curated list of awesome engineering blogs, handbooks and open source repos from top technology companies

Providing example language for contracts which work with open-source software and explicitly want to encourage it's growth and development.

Power Tools for AI Engineers With Deadlines

Curated collection of projects for folks looking to collaborate within the Elm ecosystem.

More Matrix Than Matrix

[archived] effortless video-voice chat with realtime collaborative features. extensible using react components 🙌

Synchronize content between a CMIS repository and your desktop. Like Dropbox for Enterprise Content Management!