TSPF

 Tritus TSPF is an ISPF clone, which puts it into the IbmEditorFamily.

 Author:   Tritus, Inc  
 Homepage: 
 Family:   IbmEditorFamily, MainframeEditorFamily
 Platform: Windows
 License:  Commercial

It simulates the mainframe environment extremely well. The dialog boxes look just like a mainframe.

The problem is that Tritus is not in business anymore. Shame -- this is a nice editor.

 Screenshot: