Using the tilde (`) key to open the console:

addwood # - where # = the desired amount of wood
addstone #- the same as above for stone
addiron #- the same as above for iron
Invulnerability 1 - God Mode (0=Disable)
Daytime # - Set Daytime to # (1-24)
Debug 1 - Debug Mode (0=Disable)
DayTimespeed # - Set Daytime Speed to #
CreateUnit # - Create Unit # (#=Name)

On the CreateUnit # cheat code, you can type a single letter to get a listing of all possible creations for that letter. Example: "CreateUnit C" will show all units starting with "C".