@nprofile1q... @nprofile1q... PUB seems to have enjoyed a period of popularity at SAIL and MIT, but was supplanted by SCRIBE and TeX.
MIT also had an in-house version of roff called R, written in C.
Lisp machine documentation was written in Bolio which was written in Maclisp. The name was a play on the ice cream store Emack & Bolio's, obviously referring to a certain text editor.