Is there a tool to batch export MARKED frames?

Folks, one of the things I do as part of my editing workflow is I mark my storyline with markers whenever there's particular frame I like or want to use for marketing, thumbnails, etc. I name each of these markers "thumbnail" as an easy way for me to mark these frames and just keep editing; returning to them later.

I'd like a way to export of these frames with that marker name in one shot. Anyone seen anything like this?

I believe there are a couple of tools out there that can do this. Here's a free one courtesy of Adam Teale: adamteale.com/apps/fcpximageexporter/