Quinblades

Quinblades, also known as Quinquennial Swords, are the collective name of master-crafted swords made by famous bladesmith Morad Peerse, each enhanced by his own emotions and expressions of his craft and imbued with one specific element.

All of these blades can be found as legendary one-handed swords in Diablo III, three of them being fully implemented and two more released in patch 2.4.1 as cosmetic awards (for Transmogrification only).

Equippable

 * Deathwish (Arcane)
 * Fulminator (Lightning)
 * Rimeheart (Cold)

Cosmetic
So far, no Holy and Physical Quinblades were revealed.
 * Incinerator (Fire)
 * Rancor (Poison)

Trivia

 * Each of these swords actually exists in real life as a fully-functional replica, given to Blizzard Entertainment employees for 5 years of service as a long-established tradition. The blades in game are just five out of many design patterns (the design changes every year).