Any thing is okay, it doesn't even have to be enchanted; just ultra rare or odd or custom made. This is a thread about odd things after all.
The oddest thing I have ever made was a sword that unlocked nearby doors when it hit. I called it Escape. Great idea, with the spear. I also made a ring like the one ninja lord mention, except I only managed a 2 point enchantment. I also made a sheild called the Sheild of the invincible. It was going to be the shield of the unbreakable oath, but that wouldn't fit. It summoned a bound curiass, gauntlets, and shield for 180 seconds.
My favorite of all times was this little trio: first, the ring of the bird, which had a CE 4 point levitate, the Marksmans Friend, also with a CE bound longbow and full daedric armor, and could be worn as an amulet. Last but not least was a constant effect slowfall ring with a magnitued of 1. It made sure I never took damage while falling.
for you stories of prowess.