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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 192k 42.1k

  2. TypeScript TypeScript Public

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

    Go 111k 13.8k

  3. PowerToys PowerToys Public

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

    C 139k 8.5k

  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# 28.5k 4.8k

Repositories

Showing 10 of 8297 repositories
  • kata-containers Public Forked from kata-containers/kata-containers

    Kata Containers is an open source project and community working to build a standard implementation of lightweight Virtual Machines (VMs) that feel and perform like containers, but provide the workload isolation and security advantages of VMs. https://katacontainers.io/

    microsoft/kata-containers's past year of commit activity
    Rust 95 Apache-2.0 1,603 0 23 Updated Sep 9, 2026
  • aspire Public

    Aspire is the tool for code-first, extensible, observable dev and deploy.

    microsoft/aspire's past year of commit activity
    C# 6,294 MIT 985 2,059 (3 issues need help) 254 Updated Sep 9, 2026
  • vscode-vsce Public

    VS Code Extension Manager

    microsoft/vscode-vsce's past year of commit activity
    TypeScript 1,047 256 39 (9 issues need help) 15 Updated Sep 9, 2026
  • mimalloc Public

    mimalloc is a compact general purpose allocator with excellent performance.

    microsoft/mimalloc's past year of commit activity
    C 13,359 MIT 1,173 263 39 Updated Sep 9, 2026
  • prompty Public

    Prompty makes it easy to create, manage, debug, and evaluate LLM prompts for your AI applications. Prompty is an asset class and format for LLM prompts designed to enhance observability, understandability, and portability for developers.

    microsoft/prompty's past year of commit activity
    Rust 1,263 MIT 127 8 3 Updated Sep 9, 2026
  • PyRIT Public

    The Python Risk Identification Tool for generative AI (PyRIT) is an open source framework built to empower security professionals and engineers to proactively identify risks in generative AI systems.

    microsoft/PyRIT's past year of commit activity
    Python 4,433 MIT 874 57 (19 issues need help) 60 Updated Sep 9, 2026
  • winappCli Public

    winapp, the Windows App Development CLI, is a single command-line interface for managing Windows SDKs, packaging, generating app identity, manifests, certificates, and using build tools with any app framework.

    microsoft/winappCli's past year of commit activity
    C# 1,242 MIT 77 60 8 Updated Sep 9, 2026
  • skala Public

    Skala exchange-correlation functional

    microsoft/skala's past year of commit activity
    Python 258 MIT 35 8 2 Updated Sep 9, 2026
  • qdk Public

    Microsoft Quantum Development Kit, including the Q# programming language, resource estimator, and Quantum Katas

    microsoft/qdk's past year of commit activity
    Rust 1,005 MIT 210 146 (1 issue needs help) 27 Updated Sep 9, 2026
  • mssql-rs Public

    Repository for the TDS implementation in Rust.

    microsoft/mssql-rs's past year of commit activity
    Rust 50 MIT 12 44 28 Updated Sep 9, 2026
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