Divine Divinity

Glitch: Duplicate Items
(1) Quick Save the Game
(2) Pick up item with mouse icon, hold there
(3) Hover mouse over invalid place (get red X)
(4) Quick Load the Game
(5) Now you will have 2x the number of items that you had held.

Charm Glitch
When you have several charms in possession, you can put them all on a one-slotted weapon or armor and get all the effects. Bring up the window with the charm slots, then keep clicking on the weapon to bring up multiple charm slot windows. Drop the charms into each window then close them as soon as you do. You can put nearly unlimited charms on this way, but you must first have all the windows opened beforehand or you will not be able to add charms.

WARNING - You can only do this once per piece of equipment since it is an unintentional glitch.