H. G. Muller wrote on Mon, May 12, 2008 06:06 AM UTC:
Note that you can also use WinBoard as a FEN editor. There are commands
(with shortcut keys) to copy FENs from and to the clipboard. And there is
an edit-position mode that allows you to conveniently drag and drop pieces
over the board, and add new ones from a popup menu when right-clicking a
square.
http://home.hccnet.nl/h.g.muller/winboardF.html