Blatant self-publicity warning...
I just added a new report plugin for Assignment. It allows information about each assignment in a course to be displayed and exported to Excel. The information displayed is selectable at the site level. This is really useful for things like finding non-submitters in Assignments with blind marking enabled.
It also has a facility for downloading the entire Assignment for archiving purposes. A zip file is produced containing all submissions and all feedback (whether comments, uploaded files or annotated PDFs)
Any comments or ideas for improvements appreciated.