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 GPL.

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 plugin, it’s permitted in the plugin repository but you need to license YOUR plugin as GPLv3.