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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 180k 37.3k

  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# 27k 4.4k

Repositories

Showing 10 of 7469 repositories
  • vscode Public

    Visual Studio Code

    microsoft/vscode’s past year of commit activity
    TypeScript 180,482 MIT 37,275 5,000+ (548 issues need help) 959 Updated Jan 9, 2026
  • agentic-ai-lab-dotnet Public

    End-to-End Azure AI Foundry And Agents Development Laboratory

    microsoft/agentic-ai-lab-dotnet’s past year of commit activity
    Jupyter Notebook 1 MIT 2 0 0 Updated Jan 9, 2026
  • 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 4,585 MIT 633 206 (23 issues need help) 76 Updated Jan 9, 2026
  • real-time-intelligence-operations-solution-accelerator Public

    This solution accelerator provides the architecture and working solution for real-time intelligence for operations. Key features include real-time dashboard, anomaly detection, and fabric data agent.

    microsoft/real-time-intelligence-operations-solution-accelerator’s past year of commit activity
    Python 6 MIT 4 0 0 Updated Jan 9, 2026
  • fluentui-blazor Public

    Microsoft Fluent UI Blazor components library. For use with ASP.NET Core Blazor applications

    microsoft/fluentui-blazor’s past year of commit activity
    C# 4,644 MIT 459 29 3 Updated Jan 9, 2026
  • ai-dev-gallery Public

    An open-source project for Windows developers to learn how to add AI with local models and APIs to Windows apps.

    microsoft/ai-dev-gallery’s past year of commit activity
    C# 1,374 MIT 199 60 (2 issues need help) 6 Updated Jan 9, 2026
  • Microsoft.Unity.Analyzers Public

    Roslyn analyzers for Unity game developers

    microsoft/Microsoft.Unity.Analyzers’s past year of commit activity
    C# 771 MIT 83 11 (2 issues need help) 2 Updated Jan 9, 2026
  • vscode-pull-request-github Public

    GitHub Pull Requests for Visual Studio Code

    microsoft/vscode-pull-request-github’s past year of commit activity
    TypeScript 2,522 MIT 704 217 (1 issue needs help) 28 Updated Jan 9, 2026
  • vscode-copilot-chat Public

    Copilot Chat extension for VS Code

    microsoft/vscode-copilot-chat’s past year of commit activity
    TypeScript 9,249 MIT 1,561 0 118 Updated Jan 9, 2026
  • CoseSignTool Public

    CoseSignTool is a platform-agnostic command line application to COSE sign files and validate COSE signatures. CoseHandler is a library of functions for COSE signing and validation for use by .NET applications.

    microsoft/CoseSignTool’s past year of commit activity
    C# 51 MIT 19 3 6 Updated Jan 9, 2026
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