A couple of years ago I downloaded and installed a free Wordsearch "starter" package and, at that time they offered a free TWOT module which I also downloaded (as a matter of fact, the reason I downloaded their "starter" package was so that I could have an electronic version of the TWOT). I know that Wordsearch still offers their free "starter" package, but I don't think the TWOT module is free anymore. Also, if I'm not mistaken, the free Online Bible has a "locked" version of the TWOT module available on their DVD and on their website for download—I think their unlock code will cost you $10.00.
I would love it, too, if eStudySource (or anybody else for that matter) would offer the TWOT for eSword. I would gladly pay any fair price to have that resource available on my eSword desktop. What a timesaver it would be for me, as I use it extensively in my Old Testament studies. It is an outstanding resource.
I hope this helps....