Can you think of an instance where a developer might feel sufficiently itchy about licence compliance as to develop such a tool, and be inclined then to release it under a free licence?
Me neither.
If you have a perceived need for such a tool, a priori it would seem that you aren't ideologically committed to extending the free-software ecosystem.
So asking for the tool to be free seems a bit rich.
Talk to the vendors mentioned in the article, and see what sort of licence they're prepared to sell you.