If you want some extra credits in Master of Orion, hold in the ALT 
key and type MOOLA. Each time this is done you get 100 credits.

ALT-GALAXY also has some results, but as of press time I have not
been told.
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If using a hex editor (like Norton or PCTools DiskEdit), you can beef 
up your planets - or any one else's...hehe

Here's how...   load up the SAVE1.GAM (or whatever) file and search for the
planet you want to modify.  Let's say its "Maalor".

You see the record like this

Maalor....(junk hereafter)
^ this M is what I call byte 1 of the record.  Using that as a base to 
go on, here's what I've found:

Bytes 27 and 29 are the Base Planet Size Byte  31 is the current/terraformed
planet size byte  59 is the planet population (byte 60 used if > 255) byte  63
is the number of factories (byte 64 used if > 255) byte  95 is the number of
missile bases

The following have not been confirmed:
Bytes 81 and 83 are current 'build points' byte 105 is the planetary 
shielding level