Andrew Nacin announced the news on the WordPress development blog last week: plugins in the WordPress.org plugin directory can now be plugins licensed under the GPL version 3 or a compatible license. He does mention that developers are still encouraged to stick with “GPLv2 or later”, however:
The guidelines still encourage use of “GPLv2 or later,” the same license as WordPress. However, we understand that many open source libraries use other licenses that are nonetheless compatible, such as GPLv2 only, GPLv3, and Apache 2.0.
This update means the WordPress plugin directory is now identical to the theme directory when it comes to licenses.
At the very least, take this as a reminder to make sure your plugin has the proper licensing information included with it. Will this affect any of your plugins, or any plugins you’ve previously considered adding to the WordPress.org plugin directory?
(And if you’re really into WordPress and GPL stories, check out our old GPL timeline post.)