Till date, none of the sites on Stack, that I know of, have tutorials or articles posted. What I also observed was that a lot of the professional developers / testers provide links to their blogs on their profiles.
I believe that if all that information was posted on SQA, or any other Stack site, it would provide much more benefit to the users and the reason why I suggest are here:
Admit it, no matter how much we ask the users to search and read before posting the questions, we always find a barrage of similar questions that have already been answered.
If we could create an article / tutorial on, say problems with JUnit that beginners commonly encounter, then this could be the first thing that shows up when someone types the title of the question.
Although chances exist that the person will go ahead and post the question, I would say more chances exist that the person will read first. And if that turns out to be a genuine question that has been missed in the umbrella article, it can be added there by the moderator / expert / veteran.
I don't deny that a lot of sites do exist that provide some really nice tutorials on various computer topics. What they do lack is what problems are commonly encountered by beginners. A lot of questions are closed not because they fall out of scope but because the questioner does not know how to frame the questions properly.
If we could eliminate the root cause, confusion, by providing better quality learning material then we will automatically have higher quality questions.
We can have the tutorials / articles differentiated on the basis of audience rather than complexity. What happens a lot of time is that beginners (like me) go on to read expert stuff, get confused and then post sub-par questions (like me).
Now this is useful only for the pros who spend most of their times testing and finding mistakes in the programs of the mere mortals. Nothing is better than finding a quick way to do a thing that someone has tried and tested.
Bottom line, the mods here do spend copious amount of time answering questions. If repetition could be avoided, then more information could be dispensed to the members here.
Just my humble suggestion. Wanna hear back from the mods.