From the DecFamily of TextEditors, EDIT-32 runs on a multi-user operating system called TSX-32 which runs on PCs.
Author: S&H Computer Systems, Inc. Homepage: http://www.sandh.com/ Family: DecFamily Platform: TSX-32 License: Commercial
This is not free software. Also, it is not clear that you can purchase EDIT-32 separately from TSX-32.
TSX-32, incidentally, looks to be a clone of TSX-11 on PDP-11.