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Open source projects and samples from Microsoft
README.md

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 42.5k

  2. TypeScript TypeScript Public

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

    Go 111k 14.1k

  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 8309 repositories
  • testfx Public

    This repository holds the source code of Microsoft.Testing.Platform (MTP), a lightweight alternative to VSTest, as well as MSTest adapter and framework.

    microsoft/testfx's past year of commit activity
    C# 1,043 MIT 312 52 13 Updated Sep 17, 2026
  • onnxruntime Public

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

    microsoft/onnxruntime's past year of commit activity
    C++ 21,874 MIT 4,233 845 898 Updated Sep 17, 2026
  • discovery Public

    Microsoft Discovery community repository

    microsoft/discovery's past year of commit activity
    Python 242 MIT 66 0 7 Updated Sep 17, 2026
  • ms-tcg-tpm-sys Public
    microsoft/ms-tcg-tpm-sys's past year of commit activity
    Rust 0 MIT 1 2 2 Updated Sep 17, 2026
  • VirtualClient Public

    Benchmarking and monitoring automation, designed for cloud, built with .NET.

    microsoft/VirtualClient's past year of commit activity
    C# 125 MIT 74 0 37 Updated Sep 17, 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 4,491 MIT 891 56 (19 issues need help) 49 Updated Sep 17, 2026
  • aspire Public

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

    microsoft/aspire's past year of commit activity
    C# 6,310 MIT 991 2,108 (3 issues need help) 272 Updated Sep 17, 2026
  • GitHub-Copilot-for-Azure Public

    GitHub Copilot for Azure

    microsoft/GitHub-Copilot-for-Azure's past year of commit activity
    Python 251 204 216 45 Updated Sep 17, 2026
  • oxidizer Public

    Oxidizer is a platform for Rust service development which bridges the gaps in the crate ecosystem to deliver a turn-key solution to enable the efficient creation of high-scale high-availability and high-performance services in Rust.

    microsoft/oxidizer's past year of commit activity
    Rust 161 MIT 29 2 41 Updated Sep 17, 2026
  • mxc Public

    Policy-driven, layered isolation and containment

    microsoft/mxc's past year of commit activity
    Rust 1,339 MIT 78 60 26 Updated Sep 17, 2026
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