I often find questions which I flag as dup, to close or other. However I have the impression that not many other had a look at them. So my question is: Is there some queue or list for non-moderations where I can find all flagged questions. This would probably help to close or mark questions which have low quality.
With sufficient reputation, yes there is:
Yes, but the question was specifically about non-moderators. The difference between people with 10000+ rep and ♦ moderators is nominal. (In fact, at 20000 rep, the difference is almost literally nominal.) As the FAQ put it, "At the high end of this reputation spectrum there is little difference between users with high reputation and ♦ moderators." The question was specifically about non-moderators, and if you have enough reputation to view that tool, you are basically a ♦-less moderator. Jan 15, 2013 at 16:44
No, the only way (currently) to view the list of flagged questions is to either be a ♦Moderator, or have 10,000+ rep. If you have that much rep, you're virtually a moderator already. As the FAQ put it,
At the high end of this reputation spectrum there is little difference between users with high reputation and ♦ moderators. That is very much intentional. We don’t run Ask Ubuntu - Stack Exchange. The community does.
So, for your average user, the list of flagged questions is completely off-limits. You can only view it once you have obtained enough rep to officially moderate the questions.
I am in hearty support of your idea - normal users being able to view the flagged questions list. Not at 1 rep, though... 250 might be appropriate. (200 is when you can see the Review queue.)
10k reputation isn't really the high end, though. It's getting up there...but fundamentally different from moderator powers. With 20k you're a "trusted user" and can delete downvoted answers. Anyone under 20k can only remove answers by flagging for moderator attention. (Except in the case of spam that is flagged as such. But that's an exceptional circumstance.) Jan 25, 2013 at 2:11