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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 168k 30.7k

  2. TypeScript TypeScript Public

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

    TypeScript 102k 12.7k

  3. PowerToys PowerToys Public

    Windows system utilities to maximize productivity

    C# 115k 6.8k

  4. terminal terminal Public

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

    C++ 97.2k 8.5k

  5. semantic-kernel semantic-kernel Public

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

    C# 23.3k 3.5k

Repositories

Showing 10 of 6679 repositories
  • lage Public

    Task runner in JS monorepos

    microsoft/lage’s past year of commit activity
    TypeScript 756 MIT 74 97 31 Updated Mar 1, 2025
  • VSSDK-Analyzers Public

    Roslyn analyzers for Visual Studio extensions

    microsoft/VSSDK-Analyzers’s past year of commit activity
    C# 48 MIT 28 12 (1 issue needs help) 7 Updated Mar 1, 2025
  • beachball Public

    The Sunniest Semantic Version Bumper

    microsoft/beachball’s past year of commit activity
    TypeScript 770 MIT 87 94 (1 issue needs help) 20 Updated Mar 1, 2025
  • vs-validation Public

    Common input and integrity validation routines for Visual Studio and other applications

    microsoft/vs-validation’s past year of commit activity
    C# 113 29 3 4 Updated Mar 1, 2025
  • 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 4,202 MIT 552 173 (15 issues need help) 54 Updated Mar 1, 2025
  • semantic-kernel Public

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

    microsoft/semantic-kernel’s past year of commit activity
    C# 23,306 MIT 3,545 368 34 Updated Mar 1, 2025
  • preflate-rs Public

    Library to decompress DEFLATE compressed data and recreate it exactly bit-for-bit. Useful for transparently recompressing with a better algorithm.

    microsoft/preflate-rs’s past year of commit activity
    Rust 8 Apache-2.0 7 0 0 Updated Mar 1, 2025
  • onnxruntime Public

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

    microsoft/onnxruntime’s past year of commit activity
    C++ 15,799 MIT 3,068 2,550 549 Updated Mar 1, 2025
  • quicreach Public

    A 'ping' equivalent tool for QUIC.

    microsoft/quicreach’s past year of commit activity
    C++ 112 MIT 28 3 (1 issue needs help) 0 Updated Mar 1, 2025
  • Power-Fx Public

    Power Fx low-code programming language

    microsoft/Power-Fx’s past year of commit activity
    C# 3,247 MIT 335 257 (9 issues need help) 65 Updated Mar 1, 2025
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