Comix is great for handling collections of scanned documents. I scan documents into JPEG files (much smaller size than alternatives) and collect into ZIP file. (TIFF has this capability built-in but compression is bad.)
Would love to have ability to print individual pages, for this reason; others probably want this for other reasons.
Can be simple, something like a setting for "enter shell command for printing an extracted image file", which defaults to "jpeg2ps | lpr" or something like that, and then Comix extracts the single page and prints it. Would make Comix infinitely more versatile.