Isotope 2.2 And Up is GPL Compatible

For a long time, the Isotope jquery library has had a commercial license that made it not really compatible with the GPLGPL GPL is an acronym for GNU Public License. It is the standard license WordPress uses for Open Source licensing The GPL is a ‘copyleft’ license This means that derivative work can only be distributed under the same license terms. This is in distinction to permissive free software licenses, of which the BSD license and the MIT License are widely used examples..

Isotope v2.2.0 has shipped with revised licensing model that is GPLv3 by default. Purchasing a commercial license allows use outside of the GPL, under the Commercial License terms, without causing conflicts. You can read details at:

You can see the whole history here:

The tl;dr is this: If you’re using Isotope 2.2 and up in your pluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the Plugin Directory or can be cost-based plugin from a third-party, it’s permitted in the plugin repository but you need to license YOUR plugin as GPLv3.