Good grief, following on from my bit about the patent, I wandered around that amazing place the Internet. Products I haven't touched for years (they are no longer published) and yet there's a number of mentions. Honourable mention is awarded to Magpie for this:
....Syracuse were among a number of similar magazines which used Longman Logotron's Magpie browser which held sway in the days long before HTML....
Ahhh, the days before HTML when everyone thought multimedia was it. On usenet I found an announcement about Magpie and Genesis from 1993 and our support for Acorn Replay - the external application that played by video files.