Multiterm 128 v2.0 by Stephen Thompson (1986) - This is one of the earliest versions of this 40/80 column terminal program for the Commodore 128 that I've found as of 1/28/2024.  Thanks to DLH for sharing the collection this was found among.  If you're looking for the newest version, I believe it's Multiterm 128 v3.7 that can be found here.