At this page:
There are links to pages with information on, say, contextFraction.pl. But the links are broken for me. Did something get lost during the move?
I believe the plan was to migrate the POD files from demo.webwork.rochester.edu to webwork.maa.org. It seems that the links were changed, but the files that they point to were not migrated. If you change "http://webwork.maa.org/pod/pg_TRUNK" to "https://demo.webwork.rochester.edu/wwdocs/pg" in those links you will get to what you are looking for.
Clearly, this is something that needs to be fixed.