I have two things for the Macintosh which will be on display in the demo room.

SWITCHinfo Reader

a HyperCard stack for the Macintosh giving interactive access to the anonymous file archive. (Archive)

Mac x.500 DUA

Then there is a HyperCard based X.500 DUA built on DIXIE. See the README.

RARE Templates

Another thing could be the completed filled-intemplates which were collected by RARE WG3 USIS which was the basis for the RARE Technical Report. 1. It is a whole subtree.
Thomas Lenggenhager