Here's a typical example: http://www2.towerhobbies.com/cgi-bin...?&I=LXACW8&P=4

It has 12v output for a starter, switched and reversable 12v output for a fuel pump, a variable output for a glow plug, with a meter to tell how high it's set (and which helps you tell if you've blown your plug), and a charger for a glow starter (which I refuse to use since the driver on the panel works so much better).