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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 193k 43.9k

  2. TypeScript TypeScript Public

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

    Go 111k 15.4k

  3. PowerToys PowerToys Public

    Microsoft PowerToys is a collection of utilities that supercharge productivity and customization on Windows

    C 139k 8.6k

  4. terminal terminal Public

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

    C++ 105k 9.6k

  5. semantic-kernel semantic-kernel Public

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

    C# 28.6k 4.8k

Repositories

Showing 10 of 8318 repositories
  • 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# 938 178 24 (1 issue needs help) 7 Updated Sep 29, 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# 4,836 MIT 485 18 6 Updated Sep 29, 2026
  • mxc Public

    Policy-driven, layered isolation and containment

    microsoft/mxc's past year of commit activity
    Rust 1,381 MIT 85 40 16 Updated Sep 29, 2026
  • WSL Public

    Windows Subsystem for Linux

    microsoft/WSL's past year of commit activity
    C++ 33,796 MIT 1,837 940 62 Updated Sep 29, 2026
  • Employee-Self-Service-Agent-Developer-Kit Public

    Customize your Employee Self-Service (ESS) agent using GitHub Copilot

    microsoft/Employee-Self-Service-Agent-Developer-Kit's past year of commit activity
    Python 27 MIT 17 26 35 Updated Sep 29, 2026
  • 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# 12,033 MIT 709 27 (11 issues need help) 32 Updated Sep 29, 2026
  • fluentui-react-native Public

    A react-native component library that implements the Fluent Design System.

    microsoft/fluentui-react-native's past year of commit activity
    TypeScript 1,443 MIT 179 61 16 Updated Sep 29, 2026
  • BC-Bench Public

    Inspired by SWE-Bench, for Business Central (AL) ecosystem.

    microsoft/BC-Bench's past year of commit activity
    Jupyter Notebook 57 MIT 31 1 25 Updated Sep 29, 2026
  • TextWorld Public

    ​TextWorld is a sandbox learning environment for the training and evaluation of reinforcement learning (RL) agents on text-based games.

    microsoft/TextWorld's past year of commit activity
    Jupyter Notebook 1,448 207 10 9 Updated Sep 29, 2026
  • fabric-jumpstart Public

    Fabric Jumpstart provides high-quality accelerators, demos, and tutorials that install directly into your workspace in minutes.

    microsoft/fabric-jumpstart's past year of commit activity
    Jupyter Notebook 59 MIT 34 23 36 Updated Sep 29, 2026
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