During the game you can hold down ALT and type:

 moola (Plus 1000 credits)
menlo (Complete your current reasearch)
einstein (Finish reasearching all possible non advanced technologies)
score (See current score)
iseeall (Gives your race omniscience)
canbonlyl (Declares war on everybody)
crunch (Planet screen only, turns current construction time to 1 turn)