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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 178k 36.1k

  2. TypeScript TypeScript Public

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

    TypeScript 107k 13.1k

  3. PowerToys PowerToys Public

    Microsoft PowerToys is a collection of utilities that help you customize Windows and streamline everyday tasks

    C# 126k 7.5k

  4. terminal terminal Public

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

    C++ 101k 8.9k

  5. semantic-kernel semantic-kernel Public

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

    C# 26.6k 4.3k

Repositories

Showing 10 of 7331 repositories
  • build-server-for-gradle Public

    An implementation of the Build Server Protocol for Gradle

    microsoft/build-server-for-gradle’s past year of commit activity
    Java 68 MIT 16 31 (3 issues need help) 0 Updated Nov 11, 2025
  • onnxscript Public

    ONNX Script enables developers to naturally author ONNX functions and models using a subset of Python.

    microsoft/onnxscript’s past year of commit activity
    Python 409 MIT 90 224 (1 issue needs help) 39 Updated Nov 11, 2025
  • java-debug Public

    The debug server implementation for Java. It conforms to the debug protocol of Visual Studio Code (DAP, Debugger Adapter Protocol).

    microsoft/java-debug’s past year of commit activity
    Java 388 181 48 (3 issues need help) 10 Updated Nov 11, 2025
  • vscode-java-test Public

    Run and debug Java test cases in Visual Studio Code.

    microsoft/vscode-java-test’s past year of commit activity
    TypeScript 314 161 119 (13 issues need help) 2 Updated Nov 11, 2025
  • PowerToys Public

    Microsoft PowerToys is a collection of utilities that help you customize Windows and streamline everyday tasks

    microsoft/PowerToys’s past year of commit activity
    C# 125,608 MIT 7,467 5,000+ (220 issues need help) 90 Updated Nov 11, 2025
  • typescript-go Public

    Staging repo for development of native port of TypeScript

    microsoft/typescript-go’s past year of commit activity
    Go 22,754 Apache-2.0 735 131 (1 issue needs help) 64 Updated Nov 11, 2025
  • fluentui-charting-contrib Public

    Contributor tools and guides for fluentui charting library

    microsoft/fluentui-charting-contrib’s past year of commit activity
    TypeScript 20 MIT 13 2 15 Updated Nov 11, 2025
  • agent-framework Public

    A framework for building, orchestrating and deploying AI agents and multi-agent workflows with support for Python and .NET.

    microsoft/agent-framework’s past year of commit activity
    C# 4,892 MIT 697 386 80 Updated Nov 11, 2025
  • agent-lightning Public

    The absolute trainer to light up AI agents.

    microsoft/agent-lightning’s past year of commit activity
    Python 7,895 MIT 616 47 24 Updated Nov 11, 2025
  • Olive Public

    Olive: Simplify ML Model Finetuning, Conversion, Quantization, and Optimization for CPUs, GPUs and NPUs.

    microsoft/Olive’s past year of commit activity
    Python 2,178 MIT 257 12 5 Updated Nov 11, 2025
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