I'd largely forgotten about Mandrake/Mandriva, did they offer a live environment with installer as a GUI application? I'd tried to install Mandrake probably closer to the year 2000 and it certainly did not, but, there's a 4 year gap there that's a blind spot for me pre-Ubuntu.

Never messed with Corel as it wasn't around long, so can't speak for that one.

Focusing more on say, 2005ish, can you think of other examples?