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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 181k 37.4k

  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# 128k 7.6k

  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# 27.1k 4.4k

Repositories

Showing 10 of 7496 repositories
  • vscode-cpptools Public

    Official repository for the Microsoft C/C++ extension for VS Code.

    microsoft/vscode-cpptools’s past year of commit activity
    TypeScript 6,014 1,697 1,405 (197 issues need help) 12 Updated Jan 18, 2026
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    microsoft/winget-pkgs’s past year of commit activity
    PowerShell 10,138 MIT 5,925 1,069 400 Updated Jan 18, 2026
  • HeurAgenix Public
    microsoft/HeurAgenix’s past year of commit activity
    Python 72 MIT 18 1 0 Updated Jan 18, 2026
  • STL Public

    MSVC's implementation of the C++ Standard Library.

    microsoft/STL’s past year of commit activity
    C++ 10,952 1,608 530 (3 issues need help) 28 Updated Jan 18, 2026
  • mcscatblog Public
    microsoft/mcscatblog’s past year of commit activity
    SCSS 7 MIT 5 8 14 Updated Jan 18, 2026
  • openjdk-jdk Public Forked from openjdk/jdk

    JDK main-line development

    microsoft/openjdk-jdk’s past year of commit activity
    Java 36 GPL-2.0 6,379 0 10 Updated Jan 18, 2026
  • 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# 976 MIT 291 204 18 Updated Jan 18, 2026
  • PSRule Public

    Validate infrastructure as code (IaC) and objects using PowerShell rules.

    microsoft/PSRule’s past year of commit activity
    C# 452 MIT 60 65 (2 issues need help) 7 Updated Jan 18, 2026
  • hve-core Public

    A refined collection of Hypervelocity Engineering components (instructions, prompts, agents) to start your project off right, or upgrade your existing projects to get the most out of all Copilots

    microsoft/hve-core’s past year of commit activity
    PowerShell 56 MIT 25 23 3 Updated Jan 18, 2026
  • webauthntest Public

    WebAuthn Test Site

    microsoft/webauthntest’s past year of commit activity
    JavaScript 32 18 1 0 Updated Jan 18, 2026
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