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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 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
  • lsif-node Public

    Define an index format for Language Servers

    microsoft/lsif-node’s past year of commit activity
    TypeScript 188 MIT 37 15 2 Updated Jan 17, 2026
  • FLAML Public

    A fast library for AutoML and tuning. Join our Discord: https://discord.gg/Cppx2vSPVP.

    microsoft/FLAML’s past year of commit activity
    Jupyter Notebook 4,274 MIT 548 186 (14 issues need help) 33 Updated Jan 17, 2026
  • homebrew-mssql-release Public
    microsoft/homebrew-mssql-release’s past year of commit activity
    Ruby 96 29 3 0 Updated Jan 17, 2026
  • win-net-test Public

    Networking related test tools for Windows. Relevant for anyone who is interested in Windows networking.

    microsoft/win-net-test’s past year of commit activity
    C 31 MIT 10 3 5 Updated Jan 17, 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) 12 Updated Jan 17, 2026
  • xdp-for-windows Public

    XDP speeds up networking on Windows

    microsoft/xdp-for-windows’s past year of commit activity
    C 451 MIT 55 59 (1 issue needs help) 4 Updated Jan 17, 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 16 Updated Jan 17, 2026
  • PhiCookBook Public

    This is a Phi Family of SLMs book for getting started with Phi Models. Phi a family of open sourced AI models developed by Microsoft. Phi models are the most capable and cost-effective small language models (SLMs) available, outperforming models of the same size and next size up across a variety of language, reasoning, coding, and math benchmarks

    microsoft/PhiCookBook’s past year of commit activity
    Jupyter Notebook 3,652 MIT 474 0 3 Updated Jan 17, 2026
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    microsoft/winget-pkgs’s past year of commit activity
    PowerShell 10,133 MIT 5,920 1,069 378 Updated Jan 17, 2026
  • generative-ai-for-beginners Public

    21 Lessons, Get Started Building with Generative AI

    microsoft/generative-ai-for-beginners’s past year of commit activity
    Jupyter Notebook 105,249 MIT 56,210 3 5 Updated Jan 17, 2026
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