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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.

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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 Public

    Visual Studio Code

    TypeScript 174k 33.6k

  2. TypeScript Public

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

    TypeScript 105k 12.9k

  3. PowerToys Public

    Windows system utilities to maximize productivity

    C# 121k 7.2k

  4. terminal Public

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

    C++ 98.9k 8.6k

  5. semantic-kernel Public

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

    C# 25.4k 4k

Repositories

Showing 10 of 6955 repositories
  • demikernel Public

    Kernel-Bypass LibOS Architecture

    Rust 1,152 MIT 133 86 (6 issues need help) 4 Updated Jul 12, 2025
  • vsts-extension-retrospectives Public

    An Azure DevOps extension for efficient retrospectives

    TypeScript 198 MIT 87 215 (3 issues need help) 11 Updated Jul 12, 2025
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    PowerShell 9,525 MIT 5,214 961 119 Updated Jul 12, 2025
  • onnxscript Public

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

    Python 361 MIT 72 225 (1 issue needs help) 43 Updated Jul 12, 2025
  • mscclpp Public

    MSCCL++: A GPU-driven communication stack for scalable AI applications

    C++ 385 MIT 60 11 18 Updated Jul 12, 2025
  • go-infra Public

    Infrastructure supporting the use of Go in Microsoft

    Go 29 MIT 7 0 3 Updated Jul 12, 2025
  • genaiscript Public

    Automatable GenAI Scripting

    TypeScript 2,711 MIT 196 118 (2 issues need help) 6 Updated Jul 12, 2025
  • onnxruntime Public

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

    C++ 17,163 MIT 3,331 2,008 254 Updated Jul 12, 2025
  • onnxruntime-genai Public

    Generative AI extensions for onnxruntime

    C++ 752 MIT 196 117 36 Updated Jul 12, 2025
  • Olive Public

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

    Python 2,002 MIT 226 68 11 Updated Jul 12, 2025