[capdeck]

I can't believe DOS Navigator [1] is not mentioned - true MDI in TUI using Turbo Vision. Ran circles around Norton Commander. Even had a freaking spreadsheet built-in!

[1]: https://en.wikipedia.org/wiki/DOS_Navigator

[dmitriid]

I think it was relatively unknown outside of former USSR (having been created by a team in, of all places, Moldova).

It was insanely good.