/gimme: A perennial favorite. This gives your character one of every item, every spell, every piece of equipment, etc. Now try to get rid of them!
THIS WILL MARK YOU AS A CHEATER FOREVER.
type in /give g followed by a number and you can get as much gold as possible.
/inn: This recharges your character's HP and MP to their current maximum values.
All you do is type in /terrain on the chat box and then you will be able to see all of the little terrain boxes. This is helpful to me because I tend to get stuck in places alot. This cheat will not mark you as a cheater. Simply type in the same thing again to make it go away.