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Open source projects and samples from Microsoft
README.md

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 37.4k

  2. TypeScript TypeScript Public

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

    TypeScript 107k 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++ 101k 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 7496 repositories
  • simplechat Public

    Secure AI conversations with documents, video, audio, and more. Personal workspaces for focused context, group spaces for shared insight. Classify docs, reuse prompts, and extend with modular features.

    microsoft/simplechat’s past year of commit activity
    Python 108 90 135 9 Updated Jan 18, 2026
  • PowerToys Public

    Microsoft PowerToys is a collection of utilities that help you customize Windows and streamline everyday tasks

    microsoft/PowerToys’s past year of commit activity
    C# 128,014 MIT 7,598 5,000+ (220 issues need help) 79 Updated Jan 18, 2026
  • backfill Public

    A JavaScript caching library for reducing build time

    microsoft/backfill’s past year of commit activity
    TypeScript 165 MIT 33 15 4 Updated Jan 18, 2026
  • windows-networking-tools Public

    Tools for viewing and managing Windows network configurations

    microsoft/windows-networking-tools’s past year of commit activity
    C++ 43 MIT 16 0 2 Updated Jan 18, 2026
  • AOCoptimizer.jl Public

    Optimization solver backend for analog optical computer

    microsoft/AOCoptimizer.jl’s past year of commit activity
    Julia 9 MIT 4 1 1 Updated Jan 18, 2026
  • SAIMOpt.jl Public

    Julia back-end for using the AOC/AIM optimization service

    microsoft/SAIMOpt.jl’s past year of commit activity
    Julia 6 MIT 3 0 0 Updated Jan 18, 2026
  • CsWinRT Public

    C# language projection for the Windows Runtime

    microsoft/CsWinRT’s past year of commit activity
    C# 619 MIT 122 215 25 Updated Jan 18, 2026
  • just Public

    The task library that just works

    microsoft/just’s past year of commit activity
    TypeScript 1,978 MIT 92 40 (2 issues need help) 8 Updated Jan 18, 2026
  • quicreach Public

    A 'ping' equivalent tool for QUIC.

    microsoft/quicreach’s past year of commit activity
    C++ 136 MIT 33 3 (1 issue needs help) 0 Updated Jan 18, 2026
  • onnxruntime Public

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

    microsoft/onnxruntime’s past year of commit activity
    C++ 19,007 MIT 3,654 829 378 Updated Jan 18, 2026
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