The Snowden material had these "SECRET" or "TOP SECRET" tags on every page (as seen on TV, of course!) This software tools, however, probably don't have anything like this, as, if I understand correctly, they are the binaries that should look "innocent" and fully unrelated to the US organizations in any event they are discovered, as some of them were already discovered with Stuxnet and similar events.

So I don't even see how they can be considered "classified" if the US doesn't officially admit they produced them. As far as I understand, there's nothing that carries their signs or any other such marks (like "top secret US government property").

For the reference, the production of Stuxnet by the US was never officially admitted. So you still don't have to answer you've seen something declared as secret by the US if you've seen a report about Stuxnet. And I honestly don't expect the US will soon admit the production of it officially. Unofficially, sure, there's that NYT article reporting what some "American officials" said.