Open Source Windows UML Tools

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UML Tools for Windows

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

  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build generative AI apps with Vertex AI. Switch between models without switching platforms.
    Start Free
  • Fully Managed MySQL, PostgreSQL, and SQL Server Icon
    Fully Managed MySQL, PostgreSQL, and SQL Server

    Automatic backups, patching, replication, and failover. Focus on your app, not your database.

    Cloud SQL handles your database ops end to end, so you can focus on your app.
    Try Free
  • 1
    Yaoqiang BPMN Editor

    Yaoqiang BPMN Editor

    an Open Source BPMN 2.0 / DMN 1.1 Modeler

    Yaoqiang BPMN Editor is a graphical editor for business process diagrams, compliant with OMG specifications (BPMN 2.0 / DMN 1.1).
    Leader badge
    25 Reviews
    Downloads: 44 This Week
    Last Update:
    See Project
  • 2
    The AccessMusic project provides a set of tools for creating accessible music which are freely available to download. These tools allow you to convert music scores from traditional western music notation to formats for the Blind and visually impaired.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 3
    Gaphor is a UML modeling environment written in Python. Gaphor is small and very extensible. The repository is located at http://github.com/gaphor/gaphor.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    JAG - the Java Application Generator - is a 100% Java application that generates working projects containing complete, best-of-breed J2EE applications.
    1 Review
    Downloads: 0 This Week
    Last Update:
    See Project
  • Forever Free Full-Stack Observability | Grafana Cloud Icon
    Forever Free Full-Stack Observability | Grafana Cloud

    Our generous forever free tier includes the full platform, including the AI Assistant, for 3 users with 10k metrics, 50GB logs, and 50GB traces.

    Built on open standards like Prometheus and OpenTelemetry, Grafana Cloud includes Kubernetes Monitoring, Application Observability, Incident Response, plus the AI-powered Grafana Assistant. Get started with our generous free tier today.
    Create free account
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