Open Source Windows Collaboration Software

Collaboration Software for Windows

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Browse free open source Collaboration software and projects for Windows below. Use the toggles on the left to filter open source Collaboration software by OS, license, language, programming language, and project status.

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  • 1
    Openfire

    Openfire

    An XMPP server licensed under the Open Source Apache License

    Openfire is a real time collaboration (RTC) server licensed under the Open Source Apache License. It uses the only widely adopted open protocol for instant messaging, XMPP (also called Jabber). Openfire is incredibly easy to setup and administer, but offers rock-solid security and performance.
    Downloads: 23 This Week
    Last Update:
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  • 2
    TREK

    TREK

    A self-hosted travel/trip planner with real-time collaboration

    TREK is a system designed to explore task execution, reasoning, or knowledge traversal in structured environments, likely focusing on guiding agents through complex multi-step processes. The project appears to emphasize traceability, allowing users to follow how decisions are made and how tasks progress through different stages. Its architecture suggests a focus on modular reasoning, where each step in a process is clearly defined and can be analyzed independently. This makes it particularly useful for debugging, experimentation, and understanding agent behavior in complex workflows. It may also include mechanisms for optimizing paths or improving decision-making efficiency over time. The system likely supports extensibility, enabling users to adapt it to different domains or problem types. Overall, TREK functions as a framework for structured exploration and execution in intelligent systems.
    Downloads: 9 This Week
    Last Update:
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  • 3
    CryptPad
    CryptPad is an open-source, end-to-end encrypted collaborative office suite developed by XWiki SAS. It offers a privacy-focused alternative to mainstream cloud-based productivity tools, enabling users to create, edit, and share documents securely without compromising data privacy. All content is encrypted client-side, ensuring that only authorized users can access the information. CryptPad supports various applications, including rich text documents, spreadsheets, presentations, code editing, kanban boards, polls, and whiteboards, facilitating real-time collaboration among teams. Users can access CryptPad without creating an account, and the platform also offers self-hosting options for organizations seeking full control over their data.
    Downloads: 8 This Week
    Last Update:
    See Project
  • 4
    Cucumber

    Cucumber

    Cucumber for Ruby

    It’s simple. Whether open source or commercial, our collaboration tools will boost your engineering team's performance by employing Behavior-Driven Development (BDD). And with our world-class training, take it to places it’s never been. Cucumber is a tool for running automated tests written in plain language. Because they're written in plain language, they can be read by anyone on your team. Because they can be read by anyone, you can use them to help improve communication, collaboration and trust on your team. This is the Ruby implementation of Cucumber. Cucumber is also available for JavaScript, Java, and a lot of other languages. Validate executable specifications against your code on any modern development stack. 40+ million open source downloads, the #1 tool for BDD. CucumberStudio is the leading collaboration platform for BDD - an easy-to-use tool to define ideas, test code, and learn in production from real-time insight.
    Downloads: 4 This Week
    Last Update:
    See Project
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  • 5
    Cucumber.js

    Cucumber.js

    Cucumber for JavaScript

    Cucumber is a tool for running automated tests written in plain language. Because they're written in plain language, they can be read by anyone on your team. Because they can be read by anyone, you can use them to help improve communication, collaboration and trust on your team. Cucumber.js is the JavaScript implementation of Cucumber and runs on the maintained Node.js versions. It’s simple. Whether open source or commercial, our collaboration tools will boost your engineering team's performance by employing Behavior-Driven Development (BDD). And with our world-class training, take it to places it’s never been. Validate executable specifications against your code on any modern development stack. 40+ million open source downloads, the #1 tool for BDD. CucumberStudio is the leading collaboration platform for BDD - an easy-to-use tool to define ideas, test code, and learn in production from real-time insight.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 6
    SparkleShare

    SparkleShare

    Share and collaborate by syncing with any Git repository

    SparkleShare creates a special folder on your computer. You can add remotely hosted folders (or "projects") to this folder. These projects will be automatically kept in sync with both the host and all of your peers when someone adds, removes or edits a file. SparkleShare was made to cover certain use cases, but doesn't handle every scenario well. SparkleShare uses the version control system Git under the hood, so setting up a host yourself is relatively easy. Using your own host gives you more privacy and control, as well as lots of cheap storage space and higher transfer speeds. The idea of SparkleShare sprouted at the GNOME Usability Hackfest in London, where a couple of designers came to the conclusion that they didn't have a good (Open Source) collaboration tool to share their work.
    Downloads: 4 This Week
    Last Update:
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  • 7
    Yjs

    Yjs

    Shared data types for building collaborative software

    Yjs is a high-performance, open-source CRDT (Conflict-free Replicated Data Type) implementation for building collaborative, real-time applications. It enables multiple users to edit shared data structures—such as text documents, arrays, maps, and XML trees—synchronously and offline. Yjs is network-agnostic and works with WebRTC, WebSocket, or any other transport layer, making it ideal for collaborative editors, whiteboards, and design tools. Its compact updates and powerful reconciliation system make it one of the most efficient and developer-friendly CRDT libraries available.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 8
    mm-wiki

    mm-wiki

    Lightweight enterprise knowledge sharing and team collaboration

    MM-Wiki is a lightweight enterprise knowledge sharing and team collaboration software that can be used to quickly build an enterprise Wiki and team knowledge sharing platform. Easy to deploy and easy to use, it helps teams build a collaborative environment for information sharing and document management. It is easy to deploy, written based on golang, and you only need to download and execute the binary files under the platform. Quick Installer, provides a convenient installation interface program without any manual operation. An independent space. A space is a collection of documents, usually a company department or team. The documents in the space are independent of each other. Spaces can have space access levels set on demand. Perfect system authority management, the system can customize roles and grant different permissions for different roles. Integrated unified login, the system supports user authentication through external systems.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 9
    Collabtive

    Collabtive

    Collabtive is web based project management software. Simple and easy.

    Collabtive is web based collaboration software. It is an Open Source alternative for proprietary tools like Active Collab or Basecamp. Features include: Projects, Instant Messenger, Tasks, Files, Timetracking, Multilanguage, Basecamp import
    Downloads: 16 This Week
    Last Update:
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  • 10
    eXo Platform - Digital Workplace

    eXo Platform - Digital Workplace

    The open-source digital workplace for growing teams and enterprises.

    eXo Platform is an open-source digital workplace solutions for growing teams and enterprises, featuring: ✅ Internal Communications ✅ Team Collaboration ✅ Knowledge Management ✅ Productivity and Employee Recognition use cases. eXo stands out by: 👍 its fluid and integrated employe experience, on desktop and mobile 👍 the platform’s ease of use 👍 innovative employee engagement features. eXo Platform is developed on open-source technology and supports open standards. The platform is extensible and interoperable, all services are exposed REST APIs. The platform also offers additional security capabilities, developed in collaboration with highly sensitive clients. With eXo Platform, companies can connect, engage and reward their employees, customers, and partners with its social, engagement and gamification capabilities.
    Downloads: 9 This Week
    Last Update:
    See Project
  • 11
    TWiki Enterprise Collaboration Platform

    TWiki Enterprise Collaboration Platform

    Open Source Enterprise Wiki and Web Application Platform

    Enterprise collaboration platform with over 400 extensions. Users without programming skills can create web applications. 50,000 small businesses, many Fortune 500 companies, and millions of people use TWiki, with installations of 100,000s of pages. Visit http://twiki.org/ for the open source TWiki. The TWiki community is focusing on building the best collaboration platform for the workplace. We invite you to GET INVOLVED! More at http://bit.ly/twGetInv.
    Downloads: 10 This Week
    Last Update:
    See Project
  • 12
    LatentMAS

    LatentMAS

    Latent Collaboration in Multi-Agent Systems

    LatentMAS is an advanced framework for multi-agent reinforcement learning (MARL) that uses latent variable modeling to bridge perception and decision-making in environments where agents must coordinate under uncertainty. It provides mechanisms for agents to learn high-level latent representations of states, which simplifies complex sensory inputs into compact, actionable embeddings that facilitate both individual policy learning and inter-agent coordination. Using this latent space, the framework enables Multi-Agent Systems (MAS) to scale more effectively in environments with high dimensionality — such as robotics, simulated physics tasks, and strategic games — by reducing redundant learning burdens and focusing agent exploration. LatentMAS also implements centralized training with decentralized execution, letting agents share learned representations during training while operating autonomously at inference time.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 13
    Loro

    Loro

    Make your JSON data collaborative and version-controlled with CRDTs

    loro is a high-performance CRDT (Conflict-free Replicated Data Type) engine designed for building collaborative applications that sync in real time across multiple peers or devices. Written in Rust, loro is designed to be compact, fast, and embeddable in a wide range of environments, from desktop to mobile to web via WebAssembly. Its architecture supports multiple data types like text, maps, and lists, and it offers automatic conflict resolution with minimal data overhead. It is ideal for real-time editors, whiteboards, and distributed systems that require reliable, peer-to-peer synchronization.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 14
    Wireflow

    Wireflow

    User flow chart real-time collaborative tool

    Wireflow is an open-source collaborative tool for designing and visualizing user experience flows and wireframes directly in the browser, aimed at UX designers, product managers, and developers who need to map out interactive user journeys without heavy graphic design tools. Unlike static flowchart apps, Wireflow’s interface focuses on quick and intuitive creation of flow diagrams that represent screens and transitions, helping teams prototype and iterate on navigation logic and interaction sequences. It supports real-time collaboration, meaning multiple people can work on the same flow simultaneously, making it useful for distributed teams and remote workshops. Users can drag and drop nodes, connect steps with directed lines, and annotate interactions, producing a visual blueprint for app behavior, website navigation, or feature flows.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 15
    Foswiki
    Foswiki is an Enterprise wiki, typically used to run a collaboration platform, knowledge base or document management system. Users can create wiki applications using the Topic Markup Language, and developers can extend its functionality with plugins. Foswiki stands for "Free and Open Source" wiki to emphasize its commitment to Open Source software.
    Downloads: 7 This Week
    Last Update:
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  • 16
    Feng Office: Project Management and more
    Feng Office (formerly known as OpenGoo) is a free and open source online project management and collaboration tool, licensed under the Affero GPL 3 license.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 17
    Kablink
    Kablink open team collaboration software uses social networking to unify team workspaces w/ real-time web conferencing. Collaboration for knowledge networking, program management, communities-of-practice, telework, other business process/functional areas
    Downloads: 6 This Week
    Last Update:
    See Project
  • 18
    Ganib | Project Management Software

    Ganib | Project Management Software

    Open Source, tasks, bug tracking, agile scrum, timesheet, wiki

    Ganib gives simpler ways to keep your projects organized and on track. Take advantage of easy features that help you quickstart and makes your team more efficient and productive. Open source Web based online agile project management collaboration software free, J2EE platform, MySql database with project dashboards & reporting. Organized Teams & Projects: Easily plan & manage projects with intuitive features to help your team deliver on time. Quickly focus on what's important, easily select actions to take. Be efficient for everyday work, project tasks, important details, and timelines. Tasks: Set milestones, tasks, subtasks with duration and dependencies to teams better organized. Scrum: Communicate effectively with your team using scrum, wikis & discussions to make better decisions. ​ Timesheet & Tracking: Track the time spent in real time using gTrack desktop tool with desktop screenshots. Bug Tracking: Manage bugs. Demo: http://www.ganib.com
    Downloads: 3 This Week
    Last Update:
    See Project
  • 19
    2-plan Team
    2-plan Team is an open-source project management and collaboration software. 2-plan Team is a fork of collabtive with features like gantt-chart, burn-down chart, API and mobile interface as well.
    Leader badge
    Downloads: 6 This Week
    Last Update:
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  • 20
    MyCollab - Project Management Software

    MyCollab - Project Management Software

    task management, bug tracking, kanban, project management

    WE DISCONTINUE UPDATE THE PROJECT ON SOURCEFORGE SITES. FOR THE NEW RELEASE, VISIT https://community.mycollab.com. MyCollab is a free, open source collaboration platform management. It provides the comprehensive set features of Project Management, CRM, and Document Management. MyCollab is used very well in both traditional project management or Agile methodologies. It is the web-based application runs on Java platform and MySQL database. Its installation process is simple, and you do not need to edit configuration files manually as many other Java programs. MyCollab is the final choice of many organizations to find the best software for their usages. It covers all areas of project management; it's worth to try. Installation ======== * Download MyCollab binary - https://www.mycollab.com/self-hosted/ * Follow installation guideline at https://community.mycollab.com/docs/hosting-mycollab-on-your-own-server/installing-mycollab/
    Downloads: 1 This Week
    Last Update:
    See Project
  • 21

    Collabsuite

    Linux Mail Server with Calendaring and IM

    Collabsuite is an open source mail and collaboration software which is highly integrated and cost-effective. It provides comprehensive Linux mail server with calendaring and instant messaging functionality for enterprise. With all its high-end functionality, it is a great alternative to MS Exchange and other proprietary and expensive solutions. The Server is built on GNU/Linux Debian and makes use of various free software such as Postfix, Dovecot, Ejabberd, Darwin Calendarserver and SOGo. The Webclient is based on the popular Roundcube webmail software, while the Archiver is based on the open source edition of Mail Archiva and is bundled with the Dojo Toolkit for the Chat Archive Interface.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 22
    A multi-threaded network capable drawing and collaboration program. Multiple drawing clients can connect to a server, allowing users to collaborate on a single image over the internet. Git repository: http://github.com/skitzycat/beedraw/tree/master
    Downloads: 1 This Week
    Last Update:
    See Project
  • 23
    Collab: a collaboration tool
    A tool to edit .txt files and other files (now only a simple .rtf) with multiple persons through a IRC network. Easy to use, automatic upload function so you can work togheter wherever you want. Help me to improve this! Ideas? Contact me...
    Downloads: 1 This Week
    Last Update:
    See Project
  • 24
    Effectopedia
    Effectopedia is open knowledge aggregation and collaboration tool that provides a means of describing adverse outcome pathways in encyclopedic manner.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 25
    MediaWiki Community Edition For Intranet

    MediaWiki Community Edition For Intranet

    The Free & Popular MediaWiki Web Software in Complete Virtual Machine

    This VM is created for 2 reasons: 1. Very little initial setup work required to make MediaWiki live, within minutes. 2. This system should keep running for Years, without requiring Updates / Breakages. If you are new to Virtual Machines, then please watch Video below ( taken from my other project. just replace td with mw wherever mentioned ) After starting this VM, please login to its administration panel with: Website Address: https://mw.local/ ( Accept Any Warnings Due to Usage of Self-Signed https Certificates ) Admin Username: admin Admin Password: change_this from any PC on your Local Network. Explore all the Left Side Menu Options & User Guide, before starting any page entry. Some Demo Page Data is also loaded for info sake. Feel free to clear them, as required. Once setup & running, please ensure that a Backup of system, is taken regularly, to avoid any issues. These are covered in the video. Google Search helps in finding more about MediaWiki.
    Downloads: 1 This Week
    Last Update:
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