To bring up the cheat screen, press alt+shift+c, then type in any one of these passwords:

Code - Effect:

rosebud - adds an extra $1,000
move_objects on - allows you to move all objects
cam_mode - camera toggle (cam_mode on to turn on, cam_mode off to turn off).
prepate_lot - fix required lot objects
mansion - gives you the best mansion
autonomy - intelligence (0-1,000)
interests - It'll let you change your interests and personality
music - music toggle
lot size - set lot size (number)
set_hour - set the time you want to get up (1-24)
soundevent - sound event toggle
sound - sound toggle
reload_people - total reload of animations, people, skins, and suits
move_objects off - turns off the cheat above
html - web creation toggle
water tool - you can put water around your house