I used SeaTTY for some time and it was excellent, so good I paid to register it but the free version worked better than JVcomms which I also had but where the demo version was too restrictive to give it a proper test. My laptop
crashed fatally a year back, losing all programs and data, plus we no longer have an SSB
set so are no longer using SEaTTY, but I would still recommend it, I ran it on an XP machine and also on another machine with Vista.
SeaTTY - Download