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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 184k 39.1k

  2. TypeScript TypeScript Public

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

    TypeScript 108k 13.3k

  3. PowerToys PowerToys Public

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

    C# 132k 7.9k

  4. terminal terminal Public

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

    C++ 103k 9.2k

  5. semantic-kernel semantic-kernel Public

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

    C# 27.7k 4.5k

Repositories

Showing 10 of 7755 repositories
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    microsoft/winget-pkgs’s past year of commit activity
    10,450 MIT 6,626 1,147 365 Updated Apr 11, 2026
  • EventLogExpert Public
    microsoft/EventLogExpert’s past year of commit activity
    C# 258 MIT 30 3 3 Updated Apr 11, 2026
  • prompty Public

    Prompty makes it easy to create, manage, debug, and evaluate LLM prompts for your AI applications. Prompty is an asset class and format for LLM prompts designed to enhance observability, understandability, and portability for developers.

    microsoft/prompty’s past year of commit activity
    TypeScript 1,187 MIT 113 3 1 Updated Apr 11, 2026
  • industry-apps Public

    Reusable Power Apps, Dynamics 365, and Copilot Studio Agent modules for common industry use cases.

    microsoft/industry-apps’s past year of commit activity
    Python 8 MIT 0 0 5 Updated Apr 11, 2026
  • BuildXL Public

    Microsoft Build Accelerator

    microsoft/BuildXL’s past year of commit activity
    C# 1,003 MIT 157 19 (2 issues need help) 4 Updated Apr 11, 2026
  • aspire Public

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

    microsoft/aspire’s past year of commit activity
    C# 5,805 MIT 858 1,665 (4 issues need help) 128 Updated Apr 11, 2026
  • winappCli Public

    winapp, the Windows App Development CLI, is a single command-line interface for managing Windows SDKs, packaging, generating app identity, manifests, certificates, and using build tools with any app framework.

    microsoft/winappCli’s past year of commit activity
    C# 992 MIT 44 33 6 Updated Apr 11, 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# 999 MIT 291 181 24 Updated Apr 11, 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# 11,789 MIT 648 24 (13 issues need help) 26 Updated Apr 11, 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 3,675 MIT 717 49 (26 issues need help) 56 Updated Apr 11, 2026
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