Infinite Lightsaber:
(This cheat only works if you don't kill Vrook right away and save Khoonda.) After you kill Azkul and your conversation with the administrator you will begin your talk with Vrook. Talk about the aftermath of your trial. Press him to tell you what happened and eventually a conversation strand where you ask whether or not you have the right to know will appear. Select it and then the conversation will end unexpectedly after he is finished talking, but you will receive a lightsaber afterward. Talk to him again and he will act as if Khoonda has just been saved. Repeat the previous conversation as many times you want the lightsabers.

Infinite money:
On the Ebon Hawk after you spar with Handmaiden she won't be wearing any clothes. Dress yourself, then tell her to put some on. You can sell these robes and repeat the process indefinitely.

Cheat node:
After beating Mira or Hanharr, exit the pit through the door then go through another door on the left. After you go through this door and defeat the enemies within, walk into the wall directly opposite the door you just came through and press A when your reticule turns blue.

Endless experience:
Find the broken speeder in the refugee camp on Narshadaa and install a navigation interface (you can buy one from a droid vendor). Don't repair anything else or install any other parts. You should get 400 exp and the navigation interface back. Rinse, wash, repeat.

Endless experience 2:
After getting into the secret tomb on Korriban, go in until you get near the part where Kreia comes in. Near that is a room that has a dead jedi in it. Every time you open it 2 hsissis will come(warning: if you click it too much the game will freeze. save after every level or so). You can do this to max out your health and stats.