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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 37.2k

  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# 127k 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 7458 repositories
  • garnet Public

    Garnet is a remote cache-store from Microsoft Research that offers strong performance (throughput and latency), scalability, storage, recovery, cluster sharding, key migration, and replication features. Garnet can work with existing Redis clients.

    microsoft/garnet’s past year of commit activity
    C# 11,643 MIT 629 26 (13 issues need help) 17 Updated Jan 6, 2026
  • pxt-arcade Public

    Arcade game editor based on Microsoft MakeCode

    microsoft/pxt-arcade’s past year of commit activity
    TypeScript 532 MIT 241 530 (22 issues need help) 45 Updated Jan 6, 2026
  • vscode-copilot-chat Public

    Copilot Chat extension for VS Code

    microsoft/vscode-copilot-chat’s past year of commit activity
    TypeScript 9,232 MIT 1,553 0 109 Updated Jan 6, 2026
  • Agent365-dotnet Public
    microsoft/Agent365-dotnet’s past year of commit activity
    C# 12 MIT 8 3 8 Updated Jan 6, 2026
  • vsts-extension-retrospectives Public

    An Azure DevOps extension for efficient retrospectives

    microsoft/vsts-extension-retrospectives’s past year of commit activity
    TypeScript 201 MIT 95 166 (2 issues need help) 3 Updated Jan 6, 2026
  • mcp Public

    Catalog of official Microsoft MCP (Model Context Protocol) server implementations for AI-powered data access and tool integration

    microsoft/mcp’s past year of commit activity
    C# 2,391 MIT 334 214 (29 issues need help) 56 Updated Jan 6, 2026
  • vscode-fabric Public

    Microsoft Fabric extension for VS Code

    microsoft/vscode-fabric’s past year of commit activity
    TypeScript 31 MIT 7 13 7 Updated Jan 6, 2026
  • FluidFramework Public

    Library for building distributed, real-time collaborative web applications

    microsoft/FluidFramework’s past year of commit activity
    TypeScript 4,906 MIT 561 17 81 Updated Jan 6, 2026
  • onnxruntime Public

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

    microsoft/onnxruntime’s past year of commit activity
    C++ 18,876 MIT 3,629 831 376 Updated Jan 6, 2026
  • ApplicationInsights-dotnet Public

    ApplicationInsights-dotnet

    microsoft/ApplicationInsights-dotnet’s past year of commit activity
    C# 588 MIT 293 156 6 Updated Jan 6, 2026
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