Re: Xrefactory violates Emacs license?

[Karl Fogel <kfogel@red-bean.com>]

Jeremy Maitin-Shepard <jeremy@jeremyms.com> writes:
> I just became aware of this product:
> http://www.xref-tech.com/xrefactory/main.html
>
> It seems to consist of some external process written in C that
> communicates over a file descriptor with a user interface written in
> Emacs Lisp.  The Emacs Lisp user interface is not merely some additional
> interface to an existing program; rather, it is the only interface to
> the program, and the program was designed specifically for this Emacs
> interface.
>
> The product is sold under a proprietary license and the (non-elisp)
> source code is not provided.  I apologize if the FSF is already aware of
> this product.  If not, I figured I'd send a message to the list, since
> it seems that this product may potentially constitute a license
> violation.

I think this page has the reporting information you need:

   https://www.fsf.org/licensing/licenses/gpl-violation.html

-Karl