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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 173k 32.9k

  2. TypeScript TypeScript Public

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

    TypeScript 105k 12.9k

  3. PowerToys PowerToys Public

    Windows system utilities to maximize productivity

    C# 120k 7.1k

  4. terminal terminal Public

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

    C++ 98.5k 8.6k

  5. semantic-kernel semantic-kernel Public

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

    C# 24.9k 3.9k

Repositories

Showing 10 of 6895 repositories
  • 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# 4,354 MIT 424 30 5 Updated Jun 7, 2025
  • azure_arc Public

    Automated Azure Arc, Azure Local, IoT, and Kubernetes environments

    microsoft/azure_arc’s past year of commit activity
    HTML 790 CC-BY-4.0 582 3 0 Updated Jun 7, 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 4,343 MIT 576 161 (13 issues need help) 58 Updated Jun 7, 2025
  • vscode Public

    Visual Studio Code

    microsoft/vscode’s past year of commit activity
    TypeScript 173,224 MIT 32,922 5,000+ (436 issues need help) 571 Updated Jun 7, 2025
  • vssdktestfx Public

    A testing framework for Visual Studio extensions

    microsoft/vssdktestfx’s past year of commit activity
    C# 18 MIT 9 2 3 Updated Jun 7, 2025
  • CsWin32 Public

    A source generator to add a user-defined set of Win32 P/Invoke methods and supporting types to a C# project.

    microsoft/CsWin32’s past year of commit activity
    C# 2,303 MIT 104 125 (2 issues need help) 15 Updated Jun 7, 2025
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    microsoft/winget-pkgs’s past year of commit activity
    PowerShell 9,421 MIT 5,114 971 106 Updated Jun 7, 2025
  • vs-streamjsonrpc Public

    The StreamJsonRpc library offers JSON-RPC 2.0 over any .NET Stream, WebSocket, or Pipe. With bonus support for request cancellation, client proxy generation, and more.

    microsoft/vs-streamjsonrpc’s past year of commit activity
    C# 842 157 48 (1 issue needs help) 3 Updated Jun 7, 2025
  • testfx Public

    This repository holds the source code of Microsoft.Testing.Platform (MTP), a lightweight alternative to VSTest, as well as MSTest adapter and framework.

    microsoft/testfx’s past year of commit activity
    C# 884 MIT 275 255 26 Updated Jun 7, 2025
  • finops-toolkit Public

    Tools and resources to help you adopt and implement FinOps capabilities that automate and extend the Microsoft Cloud.

    microsoft/finops-toolkit’s past year of commit activity
    PowerShell 404 MIT 150 189 (32 issues need help) 22 Updated Jun 7, 2025
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