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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 182k 38.2k

  2. TypeScript TypeScript Public

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

    TypeScript 108k 13.2k

  3. PowerToys PowerToys Public

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

    C# 130k 7.7k

  4. terminal terminal Public

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

    C++ 102k 9.1k

  5. semantic-kernel semantic-kernel Public

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

    C# 27.3k 4.5k

Repositories

Showing 10 of 7604 repositories
  • aspire.dev Public

    The official website for all things aspire.dev.

    microsoft/aspire.dev’s past year of commit activity
    MDX 102 MIT 51 80 21 Updated Feb 27, 2026
  • onnxruntime Public

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

    microsoft/onnxruntime’s past year of commit activity
    C++ 19,401 MIT 3,729 849 424 Updated Feb 27, 2026
  • vscode Public

    Visual Studio Code

    microsoft/vscode’s past year of commit activity
    TypeScript 182,117 MIT 38,177 5,000+ (525 issues need help) 1,214 Updated Feb 27, 2026
  • BCApps Public

    Repository for collaboration on Microsoft Dynamics 365 Business Central applications.

    microsoft/BCApps’s past year of commit activity
    AL 542 MIT 341 77 80 Updated Feb 27, 2026
  • LightGBM Public

    A fast, distributed, high performance gradient boosting (GBT, GBDT, GBRT, GBM or MART) framework based on decision tree algorithms, used for ranking, classification and many other machine learning tasks.

    microsoft/LightGBM’s past year of commit activity
    C++ 18,109 MIT 3,986 432 (8 issues need help) 56 Updated Feb 27, 2026
  • teams.net Public

    a suite of packages used to build on the Teams Platform.

    microsoft/teams.net’s past year of commit activity
    C# 27 MIT 16 30 29 Updated Feb 27, 2026
  • Power-Fx Public

    Power Fx low-code programming language

    microsoft/Power-Fx’s past year of commit activity
    C# 3,339 MIT 357 274 (9 issues need help) 82 Updated Feb 27, 2026
  • fluentui-system-icons Public

    Fluent System Icons are a collection of familiar, friendly and modern icons from Microsoft.

    microsoft/fluentui-system-icons’s past year of commit activity
    HTML 10,407 MIT 768 176 (1 issue needs help) 15 Updated Feb 27, 2026
  • PowerToys Public

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

    microsoft/PowerToys’s past year of commit activity
    C# 130,128 MIT 7,726 5,000+ (205 issues need help) 121 Updated Feb 27, 2026
  • tyger Public

    Remote signal processing.

    microsoft/tyger’s past year of commit activity
    Go 61 MIT 18 11 2 Updated Feb 27, 2026
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