Way back in the mists of time, Six Apart
, something many described as an on-line version of their self-hosted software Movable Type
meant for less technical users (or simply for those who didn't want to bother with technical stuff and just blog). Compare it to Wordpress.com vs. Wordpress.org, if you will. TypePad expanded rapidly and became a very large and succesfull premium blogging service, which it still is today. Even though it evolved over the years, you can still see some Movable Type heritage in it here and there.