Debug Mode:
During play, press
~ and type DebugMode 1 (case sensitive) to enable cheat mode. Now press ~ again and then press [Tab] to see all the debug commands. You can scroll through the commands by pressing [Tab]. Don't edit your .ini file to include the debug command as this can cause file saves corruptions and random game crashing.

On some of the cheats, it will simply give you a message saying success after you type the code and press [ENTER]. Other ones,such as the SetCHA will say Entered Target Mode. You must click on your character to enable the changes to your character.

Note: All the codes are case sensitive.
Note: Don't forget to use the command DebugMode 0 after you finish cheating, leaving NWN in debug mode can cause random crashes and corrupt save games.

Now enter any of the following codes:

dm_god - God Mode
dm_givegold X - Give Gold Amount X
dm_heal - Restore all hit points
dm_givelevel X - Set character level
dm_mylittlepony - Ride a hobby horse (Makes you really fast too)
dm_cowsfromhell - Killer flying cows

GetLevel X - Adds X # of Levels to Your Char

SetCON X - Set Constitution to X
SetWIS X - Set Wisdom to X
SetINT X - Set Intelligence to X
SetSTR X - Set Strength to X
SetCHA X - Set Charisma to X
SetDEX X - Set Dexterity to X

GiveXP X - Get indicated amount of experience points
GetLevel X - Raise indicated number of levels

ModSaveFort - Set character's fortitude save modifier
ModSaveReflex - Set character's reflex save modifier
ModSaveWill - Set character's will save modifier
ModSpellResistance - Set character's spell resistance modifier
SetAge X - Set character's age

SetAttackBase X - Set character's base attack

Extra violence level option:
To turn on an extra level of violence, open the nwnplayer.ini file and change Memory Level=1 to Memory Level=2 and Memory Access=1 to Memory Access=2. Save the file and start the game. You will see a new violence level under the 'Game Settings' tab called "Special" and it should be already selected.

Your own personal vault:
If you don't mind playing with the level editor, you can make your own personal equipment shack. Just fire up the Aurora Toolset, build a room, and drop in as much equipment as you like. Then start a new character in that module, export it (click "Save Character"), and start a new campaign game with the save character.

Teleportation:
While in debug mode point your cursor to where you want to teleport to and press the + on the num pad, you'll zap there immediately.