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Open source projects and samples from Microsoft
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Open Source at Microsoft

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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 39.4k

  2. TypeScript TypeScript Public

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

    TypeScript 109k 13.4k

  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# 27.8k 4.6k

Repositories

Showing 10 of 7791 repositories
  • teams-sdk Public

    SDK focused on building AI based applications and extensions for Microsoft Teams and other Bot Framework channels

    microsoft/teams-sdk’s past year of commit activity
    TypeScript 684 MIT 263 101 13 Updated Apr 22, 2026
  • vscode-mssql Public

    Visual Studio Code SQL Server extension.

    microsoft/vscode-mssql’s past year of commit activity
    TypeScript 1,867 581 163 13 Updated Apr 22, 2026
  • Windows-Driver-Developer-Supplemental-Tools Public

    Supplemental open-source components for use in developing device drivers for Windows.

    microsoft/Windows-Driver-Developer-Supplemental-Tools’s past year of commit activity
    CodeQL 76 37 9 3 Updated Apr 22, 2026
  • TypeAgent Public

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

    microsoft/TypeAgent’s past year of commit activity
    TypeScript 684 MIT 94 9 3 Updated Apr 22, 2026
  • vscode Public

    Visual Studio Code

    microsoft/vscode’s past year of commit activity
    TypeScript 184,152 MIT 39,351 5,000+ (502 issues need help) 1,799 Updated Apr 22, 2026
  • teams.py Public

    a suite of packages used to build on the Teams Platform.

    microsoft/teams.py’s past year of commit activity
    Python 44 MIT 20 7 (1 issue needs help) 9 Updated Apr 22, 2026
  • onnxruntime-extensions Public

    onnxruntime-extensions: A specialized pre- and post- processing library for ONNX Runtime

    microsoft/onnxruntime-extensions’s past year of commit activity
    C++ 462 MIT 128 18 28 Updated Apr 22, 2026
  • webui Public

    WebUI is a language-agnostic server-side rendering framework that compiles HTML templates into a binary protocol at build time and uses Web Components Islands Architecture for client-side interactivity. There is no JavaScript runtime on the server - rendering is Rust-native, sub-millisecond, and available from any backend language.

    microsoft/webui’s past year of commit activity
    Rust 25 MIT 3 5 (1 issue needs help) 2 Updated Apr 22, 2026
  • mcp-for-beginners Public

    This open-source curriculum introduces the fundamentals of Model Context Protocol (MCP) through real-world, cross-language examples in .NET, Java, TypeScript, JavaScript, Rust and Python. Designed for developers, it focuses on practical techniques for building modular, scalable, and secure AI workflows from session setup to service orchestration.

    microsoft/mcp-for-beginners’s past year of commit activity
    Jupyter Notebook 15,924 MIT 5,193 0 4 Updated Apr 22, 2026
  • tgrep Public

    Trigram-indexed grep with a client/server architecture for fast regex search in large codebases locally

    microsoft/tgrep’s past year of commit activity
    Rust 9 MIT 3 0 0 Updated Apr 22, 2026
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