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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 37k

  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 7.5k

  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# 26.9k 4.4k

Repositories

Showing 10 of 7448 repositories
  • 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# 2,332 MIT 323 223 (30 issues need help) 56 Updated Dec 20, 2025
  • durabletask-dotnet Public

    Out-of-process .NET SDK for the Durable Task Framework

    microsoft/durabletask-dotnet’s past year of commit activity
    C# 173 MIT 53 46 28 Updated Dec 20, 2025
  • mimalloc Public

    mimalloc is a compact general purpose allocator with excellent performance.

    microsoft/mimalloc’s past year of commit activity
    C 12,287 MIT 1,034 376 37 Updated Dec 20, 2025
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    microsoft/winget-pkgs’s past year of commit activity
    PowerShell 10,027 MIT 5,776 1,099 1,026 Updated Dec 20, 2025
  • debug-gym Public

    A Text-Based Environment for Interactive Debugging

    microsoft/debug-gym’s past year of commit activity
    Python 285 MIT 38 10 5 Updated Dec 20, 2025
  • synapse-spark-runtime Public

    Release notes for Apache Spark based Runtime for Azure Synapse Analytics and Microsoft Fabric

    microsoft/synapse-spark-runtime’s past year of commit activity
    33 MIT 6 8 0 Updated Dec 20, 2025
  • vscode-copilot-chat Public

    Copilot Chat extension for VS Code

    microsoft/vscode-copilot-chat’s past year of commit activity
    TypeScript 9,152 MIT 1,509 0 106 Updated Dec 20, 2025
  • vscode Public

    Visual Studio Code

    microsoft/vscode’s past year of commit activity
    TypeScript 179,842 MIT 37,018 5,000+ (564 issues need help) 928 Updated Dec 20, 2025
  • amplifier Public
    microsoft/amplifier’s past year of commit activity
    2,710 MIT 214 10 1 Updated Dec 20, 2025
  • amplifier-collection-toolkit Public

    Reference implementation of a toolkit collection for the Amplifier project

    microsoft/amplifier-collection-toolkit’s past year of commit activity
    Python 3 MIT 2 0 1 Updated Dec 20, 2025
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