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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 194k 44.9k

  2. TypeScript TypeScript Public

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

    Go 112k 16.1k

  3. PowerToys PowerToys Public

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

    C 140k 8.7k

  4. terminal terminal Public

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

    C++ 105k 9.7k

  5. semantic-kernel semantic-kernel Public

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

    C# 28.7k 4.8k

Repositories

Showing 10 of 8416 repositories
  • 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 4,417 MIT 583 155 (9 issues need help) 31 Updated Oct 31, 2026
  • vscode-mypy Public

    Linting support for Python using the mypy linter.

    microsoft/vscode-mypy's past year of commit activity
    Python 151 MIT 43 39 5 Updated Oct 31, 2026
  • TypeChat Public

    TypeChat is a library that makes it easy to build natural language interfaces using types.

    microsoft/TypeChat's past year of commit activity
    TypeScript 8,691 MIT 421 20 (4 issues need help) 14 Updated Oct 31, 2026
  • vscode Public

    Visual Studio Code

    microsoft/vscode's past year of commit activity
    TypeScript 194,417 MIT 44,937 5,000+ (462 issues need help) 3,051 Updated Oct 31, 2026
  • windows-rs Public

    Rust for Windows

    microsoft/windows-rs's past year of commit activity
    Rust 12,881 Apache-2.0 689 40 0 Updated Oct 31, 2026
  • win32metadata Public

    Tooling to generate metadata for Win32 APIs in the Windows SDK.

    microsoft/win32metadata's past year of commit activity
    C++ 1,507 158 183 (2 issues need help) 30 Updated Oct 31, 2026
  • garnet Public

    Garnet is a remote cache-store from Microsoft Research that offers strong performance (throughput and latency), scalability, storage, recovery, cluster sharding, key migration, and replication features. Garnet can work with existing Redis clients.

    microsoft/garnet's past year of commit activity
    C# 12,069 MIT 717 49 (11 issues need help) 47 Updated Oct 31, 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# 1,056 MIT 312 55 15 Updated Oct 31, 2026
  • aspire Public

    Aspire is the tool for code-first, extensible, observable dev and deploy.

    microsoft/aspire's past year of commit activity
    C# 6,391 MIT 1,029 2,469 (2 issues need help) 408 Updated Oct 31, 2026
  • BotFramework-WebChat Public

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

    microsoft/BotFramework-WebChat's past year of commit activity
    HTML 1,785 MIT 1,599 369 33 Updated Oct 31, 2026
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