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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 180k 37.2k

  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# 127k 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# 27k 4.4k

Repositories

Showing 10 of 7457 repositories
  • amplifier-bundle-recipes Public

    Recipes bundle for the Amplifier project

    microsoft/amplifier-bundle-recipes’s past year of commit activity
    Python 2 MIT 0 0 0 Updated Jan 4, 2026
  • amplifier Public
    microsoft/amplifier’s past year of commit activity
    2,744 MIT 218 13 2 Updated Jan 4, 2026
  • RD-Agent Public

    Research and development (R&D) is crucial for the enhancement of industrial productivity, especially in the AI era, where the core aspects of R&D are mainly focused on data and models. We are committed to automating these high-value generic R&D processes through R&D-Agent, which lets AI drive data-driven AI. 🔗https://aka.ms/RD-Agent-Tech-Report

    microsoft/RD-Agent’s past year of commit activity
    Python 10,070 MIT 1,127 65 66 Updated Jan 4, 2026
  • mscclpp Public

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

    microsoft/mscclpp’s past year of commit activity
    C++ 449 MIT 77 12 24 Updated Jan 4, 2026
  • fluentui-blazor Public

    Microsoft Fluent UI Blazor components library. For use with ASP.NET Core Blazor applications

    microsoft/fluentui-blazor’s past year of commit activity
    C# 4,642 MIT 460 30 4 Updated Jan 4, 2026
  • dstoolkit-mlops-v2 Public

    This repository contains the basic repository structure for machine learning projects based on Azure technologies (Azure ML and Azure DevOps).

    microsoft/dstoolkit-mlops-v2’s past year of commit activity
    Python 33 17 26 5 Updated Jan 4, 2026
  • BotFunctionalTestingService Public

    A service for end-to-end (functional) testing of a bot. Programmatically simulate a user’s back-and-forth conversation with a bot, to test whether the bot behaves as expected.

    microsoft/BotFunctionalTestingService’s past year of commit activity
    JavaScript 17 MIT 14 2 7 Updated Jan 4, 2026
  • lisa Public

    LISA is developed and maintained by Microsoft, to empower Linux validation.

    microsoft/lisa’s past year of commit activity
    Python 319 MIT 225 36 (3 issues need help) 34 Updated Jan 4, 2026
  • webauthntest Public

    WebAuthn Test Site

    microsoft/webauthntest’s past year of commit activity
    JavaScript 32 18 1 3 Updated Jan 4, 2026
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    microsoft/winget-pkgs’s past year of commit activity
    PowerShell 10,075 MIT 5,856 1,088 530 Updated Jan 4, 2026
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