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Open source projects and samples from Microsoft

Open Source at Microsoft

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Right now, open communities are building amazing software together, and there are excellent "good first issue" opportunities, if you're looking to get involved.

Visit opensource.microsoft.com to learn more!


Microsoft projects adopt the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ.

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  1. vscode vscode Public

    Visual Studio Code

    TypeScript 193k 42.9k

  2. TypeScript TypeScript Public

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

    Go 111k 14.5k

  3. PowerToys PowerToys Public

    Microsoft PowerToys is a collection of utilities that supercharge productivity and customization on Windows

    C 139k 8.6k

  4. terminal terminal Public

    The new Windows Terminal and the original Windows console host, all in the same place!

    C++ 105k 9.6k

  5. semantic-kernel semantic-kernel Public

    Integrate cutting-edge LLM technology quickly and easily into your apps

    C# 28.6k 4.8k

Repositories

Showing 10 of 8298 repositories
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    microsoft/winget-pkgs's past year of commit activity
    11,098 MIT 9,766 1,328 2,715 Updated Sep 22, 2026
  • onnxruntime Public

    ONNX Runtime: cross-platform, high performance ML inferencing and training accelerator

    microsoft/onnxruntime's past year of commit activity
    C++ 21,906 MIT 4,242 828 912 Updated Sep 22, 2026
  • vscode Public

    Visual Studio Code

    microsoft/vscode's past year of commit activity
    TypeScript 192,788 MIT 42,931 5,000+ (473 issues need help) 2,645 Updated Sep 22, 2026
  • mxc Public

    Policy-driven, layered isolation and containment

    microsoft/mxc's past year of commit activity
    Rust 1,352 MIT 81 49 25 Updated Sep 22, 2026
  • OpenAPI.NET Public

    The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model.

    microsoft/OpenAPI.NET's past year of commit activity
    C# 1,611 MIT 286 20 (6 issues need help) 11 Updated Sep 22, 2026
  • CCF Public

    Confidential Consortium Framework

    microsoft/CCF's past year of commit activity
    C++ 876 Apache-2.0 260 35 18 Updated Sep 22, 2026
  • simplechat Public

    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.

    microsoft/simplechat's past year of commit activity
    Python 153 116 259 5 Updated Sep 22, 2026
  • azure-devops-mcp Public

    The MCP server for Azure DevOps, bringing the power of Azure DevOps directly to your agents.

    microsoft/azure-devops-mcp's past year of commit activity
    TypeScript 2,026 MIT 651 7 7 Updated Sep 22, 2026
  • foundry-local Public
    microsoft/foundry-local's past year of commit activity
    C++ 2,557 370 82 34 Updated Sep 22, 2026
  • aspire Public

    Aspire is the tool for code-first, extensible, observable dev and deploy.

    microsoft/aspire's past year of commit activity
    C# 6,317 MIT 993 2,143 (2 issues need help) 255 Updated Sep 22, 2026