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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 169k 31.2k

  2. TypeScript TypeScript Public

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

    TypeScript 104k 12.8k

  3. PowerToys PowerToys Public

    Windows system utilities to maximize productivity

    C# 117k 6.9k

  4. terminal terminal Public

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

    C++ 97.5k 8.5k

  5. semantic-kernel semantic-kernel Public

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

    C# 23.7k 3.6k

Repositories

Showing 10 of 6728 repositories
  • 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 4,250 MIT 554 172 (14 issues need help) 53 Updated Mar 28, 2025
  • CCF Public

    Confidential Consortium Framework

    microsoft/CCF’s past year of commit activity
    C++ 805 Apache-2.0 223 99 7 Updated Mar 28, 2025
  • demikernel Public

    Kernel-Bypass LibOS Architecture

    microsoft/demikernel’s past year of commit activity
    Rust 1,110 MIT 126 85 (6 issues need help) 1 Updated Mar 28, 2025
  • typespec Public
    microsoft/typespec’s past year of commit activity
    Java 4,872 MIT 262 822 (2 issues need help) 54 Updated Mar 28, 2025
  • onnxruntime Public

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

    microsoft/onnxruntime’s past year of commit activity
    C++ 16,116 MIT 3,120 2,613 576 Updated Mar 28, 2025
  • accessibility-insights-service Public

    Accessibility Insights Service

    microsoft/accessibility-insights-service’s past year of commit activity
    TypeScript 70 53 3 26 Updated Mar 28, 2025
  • atlas-design Public

    Atlas Design System serves the Microsoft Learn design & engineering teams. We are a CSS-first design system that aspires to beautiful, accessible, themeable, reading-direction-agnostic components.

    microsoft/atlas-design’s past year of commit activity
    SCSS 58 MIT 18 3 6 Updated Mar 28, 2025
  • TypeAgent Public

    Sample code that explores an architecture for using TypeChat to build a personal agent that can work with application agents.

    microsoft/TypeAgent’s past year of commit activity
    TypeScript 138 MIT 33 0 2 Updated Mar 28, 2025
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    microsoft/winget-pkgs’s past year of commit activity
    PowerShell 9,216 MIT 4,918 876 825 Updated Mar 28, 2025
  • vscode-docs Public

    Public documentation for Visual Studio Code

    microsoft/vscode-docs’s past year of commit activity
    Markdown 5,900 4,908 92 (1 issue needs help) 8 Updated Mar 28, 2025
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