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Open source projects and samples from Microsoft
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Open Source at Microsoft

Get Involved

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 44k

  2. TypeScript TypeScript Public

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

    Go 111k 15.4k

  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 8340 repositories
  • fluentui-react-native Public

    A react-native component library that implements the Fluent Design System.

    microsoft/fluentui-react-native's past year of commit activity
    TypeScript 1,443 MIT 179 61 7 Updated Oct 1, 2026
  • qdk-chemistry Public

    A high-performance toolkit for quantum and classical chemistry calculations.

    microsoft/qdk-chemistry's past year of commit activity
    C++ 74 MIT 36 40 47 Updated Oct 1, 2026
  • BCApps Public

    Repository for collaboration on Microsoft Dynamics 365 Business Central applications.

    microsoft/BCApps's past year of commit activity
    AL 689 MIT 467 250 423 Updated Oct 1, 2026
  • openvmm Public

    Home of OpenVMM and OpenHCL

    microsoft/openvmm's past year of commit activity
    Rust 1,918 MIT 247 211 (6 issues need help) 133 Updated Oct 1, 2026
  • onnxruntime Public

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

    microsoft/onnxruntime's past year of commit activity
    C++ 21,976 MIT 4,270 897 879 Updated Oct 1, 2026
  • TypeAgent Public

    Sample code that explores an architecture for using language models to build a personal agent that can work with application agents.

    microsoft/TypeAgent's past year of commit activity
    TypeScript 743 MIT 107 18 12 Updated Oct 1, 2026
  • kiota-samples Public

    sample generation SDKs for Kiota

    microsoft/kiota-samples's past year of commit activity
    Go 116 MIT 39 0 31 Updated Oct 1, 2026
  • PyRIT Public

    The Python Risk Identification Tool for generative AI (PyRIT) is an open source framework built to empower security professionals and engineers to proactively identify risks in generative AI systems.

    microsoft/PyRIT's past year of commit activity
    Python 4,565 MIT 923 77 (16 issues need help) 67 Updated Oct 1, 2026
  • mxc Public

    Policy-driven, layered isolation and containment

    microsoft/mxc's past year of commit activity
    Rust 1,385 MIT 88 36 18 Updated Oct 1, 2026
  • PilotSwarm Public
    microsoft/PilotSwarm's past year of commit activity
    TypeScript 3 MIT 0 30 14 Updated Oct 2, 2026
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