Plone Theme Licensing Policy

Plone Foundation policies and recommendations on licensing of Plone themes, and criteria for listing themes on

These recommendations cover the distribution of theme packages for use with Plone. Themes that are not distributed do not, in general, fall under the licensing restrictions discussed here. Note that the term "package" here is used in the sense of a bundle of functionality, and not in the narrow sense of a Python package.

It is the opinion of the Plone Foundation that Plone theme packages containing Python or page-template components that import functionality from Plone's GPL components should be regarded as derivative works and, when distributed, be licensed under the same terms as Plone itself.

Plone theme packages that do not import from Plone's GPL components — such as CSS, JavaScript and image libraries applied via Diazo or — are typically not derivatives of Plone and do not necessarily fall under the GPL. They may possibly be distributed under other licensing arrangements, depending on the origins of the components. In such cases, the Plone Foundation encourages, but does not require, the use of open-source licensing such as Creative Commons licenses.

Any Plone theme package, whatever the license, may be listed in the products section of Plone theme packages that are uploaded to for distribution must be licensed under the GPL, Creative Commons, or similar open-source licenses. Those wishing to use non-open-source licensing terms should make other arrangements for distribution. All packages listed on should specify their licensing terms.

Copyright and licensing law varies over time and from jurisdiction to jurisdiction. The recommendations here are meant to express the opinions of the Plone Foundation, and should not be regarded as legal advice.

Adopted by the Board of Directors of the Plone Foundation, July 14, 2011.