GUI Builders
Logic Gui Professional
Toolbox: http://web.archive.org/web/20160619072958/http://www.blitzbasic.com/toolbox/toolbox.php?tool=182
Site: http://jsp.logiczone.de
GUIde
Toolbox: http://web.archive.org/web/20160619052400/http://www.blitzbasic.com/toolbox/toolbox.php?tool=28