As mentioned above, the Grade Me block will shows items needing grading for you. If a student resubmits or posts again, they will get listed again as needing grading.
The FN Marking Manager pretty much works the same way too, but I have not used it for a while. That's because I figured out a fairly easy way of adding to the Grade Me block so that it would also list items as needing grading for some other plugins that I used.