I made this PSD map as a quick cell reference and planner for a mod I'm working on. Thanks to XunAmarox, FloorBelow, and VirusZ for providing the base map. Basically I made grid layer and lined it up to match the cell borders in CK. There are guide numbers on all sides for quick reference. I also created some color layers that can be turned on/off (or just delete them and add your own). They give a quick visual of what is in the cell. 

Red = Enemy/Encounter
Blue = Friendly/Nuetral/Settlement
Green = Empty with Structures
Yellow = Primarily empty cell
Black = Cells edited by Bethesda DLC (confirmed with FO4Edit)

If you don't already know, you can get to a cell in two ways:
Creation Kit: Type the XY coordinates under the worldspace selector and click "Go"
In Game: Console command "cow Commonwealth X Y"