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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 179k 36.8k

  2. TypeScript TypeScript Public

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

    TypeScript 107k 13.2k

  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 9k

  5. semantic-kernel semantic-kernel Public

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

    C# 26.8k 4.4k

Repositories

Showing 10 of 7437 repositories
  • vscode Public

    Visual Studio Code

    microsoft/vscode’s past year of commit activity
    TypeScript 179,499 MIT 36,753 5,000+ (563 issues need help) 960 Updated Dec 11, 2025
  • vscode-pull-request-github Public

    GitHub Pull Requests for Visual Studio Code

    microsoft/vscode-pull-request-github’s past year of commit activity
    TypeScript 2,502 MIT 685 257 (2 issues need help) 85 Updated Dec 11, 2025
  • BotFramework-WebChat Public

    A highly-customizable web-based client for Azure Bot Services.

    microsoft/BotFramework-WebChat’s past year of commit activity
    HTML 1,751 MIT 1,605 409 34 Updated Dec 11, 2025
  • Qcodes Public

    Modular data acquisition framework

    microsoft/Qcodes’s past year of commit activity
    Python 406 MIT 339 197 49 Updated Dec 11, 2025
  • 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# 964 MIT 289 224 33 Updated Dec 11, 2025
  • 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++ 17,920 MIT 3,965 425 (10 issues need help) 43 Updated Dec 11, 2025
  • agent-lightning Public

    The absolute trainer to light up AI agents.

    microsoft/agent-lightning’s past year of commit activity
    Python 9,563 MIT 773 59 (12 issues need help) 29 Updated Dec 11, 2025
  • BCApps Public

    Repository for collaboration on Microsoft Dynamics 365 Business Central applications.

    microsoft/BCApps’s past year of commit activity
    AL 499 MIT 297 69 59 Updated Dec 11, 2025
  • language-server-protocol Public

    Defines a common protocol for language servers.

    microsoft/language-server-protocol’s past year of commit activity
    HTML 12,360 CC-BY-4.0 905 265 (26 issues need help) 18 Updated Dec 11, 2025
  • Modernize-your-code-solution-accelerator Public

    Designed to help customers transition their SQL queries to new environments quickly and efficiently. This accelerator is particularly useful for organizations modernizing their data estates, as it simplifies the process of translating SQL queries from various dialects.

    microsoft/Modernize-your-code-solution-accelerator’s past year of commit activity
    Python 88 MIT 82 0 9 Updated Dec 11, 2025
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