Well there are always the basic/classic weapons and armor., bags of holding, rope of climbing, rope of entanglement, items that grant movement (wall waking, running, water walk, fly, etc)
But for more fun here are some of the more interesting ones
[ +- ] Interesting Magic
Blink Ring (random teleportation in combat. Either semi controlled or totally random as a curse)
Invisibility cloak
Vorpal blade that can cut anything (see light saber)
Bag of Tricks : pull out random lesser summon creature that vanishes after 10 minutes
Figuring of Power: greater summon lasts 1 hour/day
X-ray goggles
Magic Map (enhances mapping features)
7 league boots (increases travel speed and combat movment)
Portal Gun
Ring of Spell turning
Hat of Disguise (illusion alters personal appearance to any known figure of approximate same size)
Apple of Greed (when thrown it appears very valuable and causes nearby NPC to fight over the item)
Drums of Discord : when played causes those that hear it to understand any spoken word as insults