Favourite text based word processing software

[Mark Wickens]

Hello group

I'm toying with the idea of writing a simple word processing package along
the lines of Wordstar for my Retrochallenge 2015/01 entry.

I have used many word processing packages over the years on many machines
from 8-bit machines to mainframes. Within the following bounds I'd love to
know the packages that have been the favourite of list members over the
years and why.

If I implement this I'd be looking to keep within the following bounds:

* text only - ideally support VT terminal 80x24 or 132x24/36/48 or DOS
80x25 display size.
* two printer drivers - text only and Epson LQ (or possibly IBM Proprinter)
* support small range of printer specific fonts
* support proportional text

So a little more than a text-editor but only enough to support simple
formatting and styles (bold, italic, underline for example).

Ideally I'd like to implement a clean, logical design without many 'bells
and whistles' concentrating on the core functionality.

Kind regards, Mark.