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Klayout

Klayout is a free, open-source CAD and 3D modelling app for Windows and Linux. This repository will hold the main sources for the KLayout project. It has 1,248 GitHub stars and is released under the GPL-3.0 license. Its source code is on GitHub at KLayout/klayout.

github.com/KLayout/klayout (opens in a new tab)

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About Klayout

This repository will hold the main sources for the KLayout project. Plugins can be included into the "plugins" directory from external sources.

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FAQ

Klayout FAQ

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Is Klayout free and open source?

Yes. Klayout's source code is public on GitHub under the GPL-3.0 license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.

How do I install Klayout?

Download the installer for Windows and Linux from its GitHub Releases page (latest: v0.30.12).

Is Klayout still maintained?

The repository's most recent commit was on Oct 18, 2026. appsgit only lists apps whose repository had a commit in the last six months.