uPMLFormDesigner is a free Plugin that can help you to develop PML forms easily, using your favorite editor Notepad++.
uPMLFormDesigner v 2.0.0 released Upd: May 05 18
uPMLFormDesigner v 1.0.2 released Upd: July 11 16
uPMLFormDesigner v 1.0.1 released (beta) Upd: Jan 30 16
PML sample from the video