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Open source projects and samples from Microsoft
README.md

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 178k 35.5k

  2. TypeScript TypeScript Public

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

    TypeScript 106k 13k

  3. PowerToys PowerToys Public

    Microsoft PowerToys is a collection of utilities that help you customize Windows and streamline everyday tasks

    C# 124k 7.4k

  4. terminal terminal Public

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

    C++ 100k 8.8k

  5. semantic-kernel semantic-kernel Public

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

    C# 26.4k 4.3k

Repositories

Showing 10 of 7200 repositories
  • teams.ts Public

    a suite of packages used to build on the Teams Platform.

    microsoft/teams.ts’s past year of commit activity
    TypeScript 23 MIT 20 72 (1 issue needs help) 6 Updated Oct 13, 2025
  • winget-pkgs Public

    The Microsoft community Windows Package Manager manifest repository

    microsoft/winget-pkgs’s past year of commit activity
    PowerShell 9,778 MIT 5,484 1,012 417 Updated Oct 13, 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# 950 MIT 285 208 33 Updated Oct 13, 2025
  • wassette Public

    Wassette: A security-oriented runtime that runs WebAssembly Components via MCP

    microsoft/wassette’s past year of commit activity
    Rust 696 MIT 42 35 (3 issues need help) 9 Updated Oct 13, 2025
  • agent-framework Public

    A framework for building, orchestrating and deploying AI agents and multi-agent workflows with support for Python and .NET.

    microsoft/agent-framework’s past year of commit activity
    Python 3,600 MIT 436 258 46 Updated Oct 13, 2025
  • fhir-server Public

    A service that implements the FHIR standard

    microsoft/fhir-server’s past year of commit activity
    TSQL 1,293 MIT 562 86 (3 issues need help) 40 Updated Oct 13, 2025
  • LightGBM Public

    A fast, distributed, high performance gradient boosting (GBT, GBDT, GBRT, GBM or MART) framework based on decision tree algorithms, used for ranking, classification and many other machine learning tasks.

    microsoft/LightGBM’s past year of commit activity
    C++ 17,729 MIT 3,944 420 (10 issues need help) 48 Updated Oct 13, 2025
  • rats Public

    Rats is a collection of tools to help researchers define and run experiments. It is designed to be a modular and extensible framework currently supporting building and running pipelines, integrating configs and services.

    microsoft/rats’s past year of commit activity
    Python 27 MIT 10 12 5 Updated Oct 13, 2025
  • vscode-mssql Public

    Visual Studio Code SQL Server extension.

    microsoft/vscode-mssql’s past year of commit activity
    TypeScript 1,783 541 180 17 Updated Oct 13, 2025
  • CAIRA Public

    Composable AI Reference Architecture (CAIRA)

    microsoft/CAIRA’s past year of commit activity
    HCL 24 MIT 0 19 (4 issues need help) 2 Updated Oct 13, 2025
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