[dspillett]

If you are going that far back how about including the original LapLink (and intersvr in MSDOS6 that implemented similar features). Pushing files over null-modem or the parallel port equivalent for extra speed was a godsend back when proper networking was relatively rare at home (or in small offices) so floppy-net was the main alternative.

The company still exists (was "Travelling Software, now renamed to Laplink Software) but obviously that specific product is pretty meaningless in today's environment unless you are playing with museum-piece hardware for nostalgia/shits/giggles.