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26 open-source CAD and 3D modelling apps

Free Open Source CAD Software

The most popular open-source CAD and 3D modelling apps for Windows, macOS and Linux on GitHub are FreeCAD, Blender and OrcaSlicer. appsgit lists 26, including free alternatives to Fusion 360, Simplify3D and AutoCAD, each with its platforms, license and install commands.

Updated Oct 28, 2026

Free Open Source CAD Software

All desktop apps A to Z · JSON API

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CAD & 3D modelling: FAQ

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What are the best open-source CAD and 3D modelling apps?

By GitHub stars, FreeCAD is the most popular (34,867 stars), followed by Blender and OrcaSlicer. People often use these instead of Fusion 360, Simplify3D and AutoCAD. Each page lists the platforms, license and last commit.

Which of these run on Windows, Mac and Linux?

26 of the 26 open-source CAD and 3D modelling apps listed here run on Windows, 23 on macOS and 24 on Linux; on a Mac, the most starred is FreeCAD. 6 can be installed with a package manager such as Flathub, Homebrew, winget or Chocolatey.

Are these open-source CAD and 3D modelling apps free?

Yes. All 26 use an open-source license (OSI-approved or FSF-free), so you can use, copy and change them for free.

How are these open-source CAD and 3D modelling apps chosen?

Apps come from desktop awesome lists (Awesome Linux Software, awesome-mac, awesome-windows, awesome-electron and the media and file sections of awesome-cli-apps), more than 70 GitHub topics such as desktop-app, electron-app, tauri-app, gtk, qt, macos-app, pdf-editor, cad and remote-desktop, and a hand-picked list of flagship apps. An app is listed only if it has a license (one GitHub detects, or one appsgit checked by hand), a README and a commit in the last six months, is not archived or a fork, and has 1000+ GitHub stars (topics), 500+ (awesome lists) or 100+ (hand-picked). It must also be an end-user application with a desktop signal: installers in its releases, install instructions for Windows, macOS or Linux, or a Flathub, Homebrew, winget, Chocolatey, Snap or AUR package. Libraries, frameworks, themes, plugins and servers are left out, and source-available apps are labelled as such.