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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 37.8k

  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 supercharge productivity and customization on Windows

    C# 129k 7.7k

  4. terminal terminal Public

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

    C++ 102k 9.1k

  5. semantic-kernel semantic-kernel Public

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

    C# 27.2k 4.5k

Repositories

Showing 10 of 7548 repositories
  • Agent365-dotnet Public
    microsoft/Agent365-dotnet’s past year of commit activity
    C# 13 MIT 8 1 6 Updated Feb 5, 2026
  • python-environment-tools Public
    microsoft/python-environment-tools’s past year of commit activity
    Rust 197 MIT 35 12 (1 issue needs help) 1 Updated Feb 5, 2026
  • onnxruntime Public

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

    microsoft/onnxruntime’s past year of commit activity
    C++ 19,213 MIT 3,684 864 391 Updated Feb 5, 2026
  • typescript-go Public

    Staging repo for development of native port of TypeScript

    microsoft/typescript-go’s past year of commit activity
    Go 24,001 Apache-2.0 815 217 (2 issues need help) 75 Updated Feb 5, 2026
  • trident Public

    Azure Linux servicing agent - security focused install, provisioning, and update

    microsoft/trident’s past year of commit activity
    Rust 19 MIT 16 12 13 Updated Feb 5, 2026
  • vscode-copilot-chat Public

    Copilot Chat extension for VS Code

    microsoft/vscode-copilot-chat’s past year of commit activity
    TypeScript 9,393 MIT 1,623 0 160 Updated Feb 5, 2026
  • esm-url-bundler-plugins Public

    Bundler plugins that preserve new URL('./file.js?esm', import.meta.url) semantics after bundling

    microsoft/esm-url-bundler-plugins’s past year of commit activity
    TypeScript 0 MIT 0 1 0 Updated Feb 5, 2026
  • typespec Public
    microsoft/typespec’s past year of commit activity
    Java 5,571 MIT 336 1,013 (2 issues need help) 50 Updated Feb 5, 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 14,248 MIT 4,688 0 0 Updated Feb 5, 2026
  • Nova Public

    Nova: High-speed recursive zero-knowledge arguments from folding schemes

    microsoft/Nova’s past year of commit activity
    Rust 817 MIT 243 10 8 Updated Feb 6, 2026
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