Is there some open source utility for recovering "deleted" files in
fat-16 format filesystems?

It seems I was a bit too quick hitting the "delete all" button on my
digital camera.  Only the first 200 pictures had transfered.  I don't
know if there was a Coolpix-995 firmware problem or a umass/fat16
problem that only transfered the first 200 filenames.  The fact that
it stopped at exactly 200 is a bit suspicious.

-wolfgang