Cyclops

Cyclopes are ill-tempered giants with one eye in the middle of their foreheads.  They were the sons of Titans, and their names were Arges, Brontes, and Steropes.  They were craftsmen and are said to have lived on the island of Sicily where they assisted in the workshops of Vulcan (under Mt. Edna).  However, their father feared them due to their colossal strength and locked them away in Tartarus.  Zeus freed them and the Cyclopes fought with Zeus against the Titans.  They forged Zeus' thunderbolts.  They are also credited with creating Pluto's helmet of invisibility and Poseidon's Trident.