Amazon UK have UltraDev and Dreamweaver MX.
Dreamweaver MX runs just fine on Windows ME.
UltraDev was never meant to support it although I've run it on ME without any real problems to speak of. UnltraDev was released for Win 95, 98, NT and 2000. I have heard of some issues from other users but it's difficult to tell whether they were down to the software or [more likely] the software setup of the system it was installed on.
click here and run a search for Dreamweaver making sure you select the Software section from the list of search options.
Software Select click here are also advertising Dreamweaver MX.
I've not seen UltraDev advertised for some time, but I'd imagine someone will find a link for you.