Does it? AFAIK it is only Seamonkey Composer that still is under a mostly actively developed project but even that is maintained mainly because of its shared co

Does it? AFAIK it is only Seamonkey Composer that still is under a mostly actively developed project but even that is maintained mainly because of its shared code with the HTML editing component for the email client. (there is also the equivalent component of Thunderbird but AFAIK that isn't available in any HTML editor)