Glamdring was originally borne by Turgon, the King of Gondolin. He must have wielded it with strength during the Nirnaeth Arnoediad or the Fall of Gondolin, for the Orcs named it "Beater", and fled before it. Even up until the late Third Age, orcs of the Misty Mountains knew of this legendary sword.
The Hand of Taurna. A divine blade passed from one Arch-Paladin to the next for several hundred years. Never actually used in combat, the true abilities of it's gleaming edge remain unknown amidst hundreds of legends.