I also just found this. For all your circa-1990 needs 
I never realized they were so cross-platform. Before they disappeared, bought out I believe, they released as a freebie Wordworth for windblows - strangely, it looked like a (impossible) straight re-compile of the Amiga version. Now I wonder if they were using their own multi-os compatibility layer all along.
Here is a link to a Wordworth-win review, of course no Amiga mention:
http://www.sharewarejunkies.com/8w3/wordwrth.htm