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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 181k 37.6k

  2. TypeScript TypeScript Public

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

    TypeScript 108k 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++ 102k 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 7514 repositories
  • vscode Public

    Visual Studio Code

    microsoft/vscode’s past year of commit activity
    TypeScript 180,979 MIT 37,554 5,000+ (540 issues need help) 995 Updated Jan 24, 2026
  • openvmm Public

    Home of OpenVMM and OpenHCL

    microsoft/openvmm’s past year of commit activity
    Rust 1,789 MIT 163 171 (8 issues need help) 72 Updated Jan 24, 2026
  • rushstack Public

    Monorepo for tools developed by the Rush Stack community

    microsoft/rushstack’s past year of commit activity
    TypeScript 6,403 662 865 (129 issues need help) 132 Updated Jan 24, 2026
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    microsoft/winget-pkgs’s past year of commit activity
    PowerShell 10,168 MIT 5,952 1,093 529 Updated Jan 24, 2026
  • hve-core Public

    A refined collection of Hypervelocity Engineering components (instructions, prompts, agents) to start your project off right, or upgrade your existing projects to get the most out of all Copilots

    microsoft/hve-core’s past year of commit activity
    PowerShell 63 MIT 26 25 7 Updated Jan 24, 2026
  • onnxruntime Public

    ONNX Runtime: cross-platform, high performance ML inferencing and training accelerator

    microsoft/onnxruntime’s past year of commit activity
    C++ 19,075 MIT 3,667 848 378 Updated Jan 24, 2026
  • aitour26-BRK441-Build-and-launch-AI-agents-fast-with-Microsoft-Foundry-and-the-AI-Toolkit Public
    microsoft/aitour26-BRK441-Build-and-launch-AI-agents-fast-with-Microsoft-Foundry-and-the-AI-Toolkit’s past year of commit activity
    Python 48 MIT 31 0 0 Updated Jan 24, 2026
  • msquic Public

    Cross-platform, C implementation of the IETF QUIC protocol, exposed to C, C++, C# and Rust.

    microsoft/msquic’s past year of commit activity
    C 4,607 MIT 636 208 (26 issues need help) 80 Updated Jan 24, 2026
  • webauthntest Public

    WebAuthn API Testing Website.

    microsoft/webauthntest’s past year of commit activity
    JavaScript 32 18 1 0 Updated Jan 24, 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# 11,680 MIT 631 20 (11 issues need help) 12 Updated Jan 24, 2026
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