I vaguely remember HoTMetaL Pro or something like that, by, maybe, SoftQuad?

a sales guy in a company where I worked long back, was making a quotation for it, or something like that.

update: i googled to check it:

https://en.m.wikipedia.org/wiki/SoftQuad_Software

james clark is mentioned there as one of their notable employees.

https://en.m.wikipedia.org/wiki/James_Clark_(programmer)

Had a relative that was a web developer, and I was using hotmetal in 5th grade, self-teaching myself how to write html and publishing things to AngelFire. Those were the days. Thanks SoftQuad.