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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 193k 43.8k

  2. TypeScript TypeScript Public

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

    Go 111k 15.3k

  3. PowerToys PowerToys Public

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

    C 139k 8.6k

  4. terminal terminal Public

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

    C++ 105k 9.6k

  5. semantic-kernel semantic-kernel Public

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

    C# 28.6k 4.8k

Repositories

Showing 10 of 8314 repositories
  • aspire Public

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

    microsoft/aspire's past year of commit activity
    C# 6,324 MIT 998 2,192 (2 issues need help) 256 Updated Sep 29, 2026
  • intelligent-terminal Public

    A fork of Windows Terminal with native agent integration, right in your command line.

    microsoft/intelligent-terminal's past year of commit activity
    C++ 2,035 MIT 164 65 66 Updated Sep 29, 2026
  • ShadowFrog Public

    A suite of AI coding agent skills that build and maintain a shadow knowledge base for any codebase.

    microsoft/ShadowFrog's past year of commit activity
    Python 28 MIT 9 5 0 Updated Sep 29, 2026
  • typespec Public
    microsoft/typespec's past year of commit activity
    Java 5,872 MIT 400 999 (2 issues need help) 57 Updated Sep 29, 2026
  • litebox Public

    A security-focused library OS supporting kernel- and user-mode execution

    microsoft/litebox's past year of commit activity
    Rust 2,698 MIT 145 129 31 Updated Sep 29, 2026
  • PyRIT Public

    The Python Risk Identification Tool for generative AI (PyRIT) is an open source framework built to empower security professionals and engineers to proactively identify risks in generative AI systems.

    microsoft/PyRIT's past year of commit activity
    Python 4,558 MIT 917 83 (19 issues need help) 54 Updated Sep 29, 2026
  • dynwinrt Public

    Use WinRT methods dynamically

    microsoft/dynwinrt's past year of commit activity
    Rust 61 MIT 6 4 5 Updated Sep 29, 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# 1,045 MIT 313 67 32 Updated Sep 29, 2026
  • nvx Public

    Cross-Platform Micro-VM Sandbox for Agentic Workloads

    microsoft/nvx's past year of commit activity
    Python 8 MIT 3 21 (1 issue needs help) 4 Updated Sep 29, 2026
  • CsWinRT Public

    C# language projection for the Windows Runtime

    microsoft/CsWinRT's past year of commit activity
    C# 665 MIT 134 232 10 Updated Sep 29, 2026
View all repositories

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