My older printer, a Printrbot, came with Repetier as the recommended software. Repetier, though far from perfect, has the lovely property that it has a box where you can type a line of gcode, and it is sent to the printer and executed right now. It's useful for setting certain firmware parameters, especially the Z=0 height. It's also useful for trying out gcode to understand it in detail.

Now if I understand right, Repetier can't be used with FlashForge because it speaks the wrong protocol. But I'd love to have this "quick tryout" ability back. Is there any program compatible with FlashForge that can send my direct, immediate gcode commands?