Are your products licensed under GPL?
Yes, our products are licensed under the GPL 3.0 (General Public License), meaning that you are allowed to modify and use our licenses. Please note that it is forbidden to use our name YITH (trademark) in any case.
However you are not allowed to make YITH plugins available for public download in ways that violate the Terms of the GPL 3.0 license. Do not infringe any intellectual property rights (e.g., copyright, trademark, patent or other proprietary rights).