The Hessling Editor -- Available from http://hessling-editor.sourceforge.net

A free implementation of the xedit/kedit editor concept(the IBM mainframe style editor, not the X Windows based editor).  

Uses [REXX] as a macro/scripting language.

Has an interesting line/block oriented prefix command area that may be more intuitive than vi's command mode editing commands.

Is (roughly) as extensible as [emacs] but uses roughly 1/15 the disk space (even less if you don't include the Regina REXX interpreter in the calculations).

Allows muscle memory to be developed for keyboard command sequences allowing rapid editing for power users (similar to power of vi or emacs).
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[LES]: Uses [REXX] as a macro/scripting language? Why? Why not Tcl? So I suppose it's just got to do with Tk, hasn't it? Because I know a little Rexx and it doesn't stink, but isn't Tcl a lot better?
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The primary reason this application appears on this wiki
is because of [viTHE] - the beginning of an attempt to
write a Tcl/Tk version of THE.