Neck:
Drakefire Amulet reward from Onyxia key quest line.
Elder Magus Pendant drops from Magister Kalendris in Dire Maul West.
Emberfury Talisman drops from Pyroguard Emberseer in UBRS.
Blazefury Medallion drops off Lord Kazzak.
Onyxia Tooth Pendant reward for turning in Onyxia’s Head.
Necklace of Sanctuary reward from very long quest chain that starts with Petty Squabbles

Back:
Cloak of Fire crafted by Pattern: Cloak of Fire which is dropped off Overmaster Pyron (the fire elemental just outside the entrance to BRD).
Mageflame Cloak World drop, found most commonly on world bosses. Worst possible cloak to get for endgame raids.
Wildfire Cape dropped by first boss in UBRs, Pyroguard Emberseer. Just as bad as mageflame, only with 5 more FR.
Cape of the Fire Salamander Dropped from boss in BRD, Ambassador Flamelash.
Cloak of Flames Drops off MC trash mobs.
Fireproof Cloak Loot from Majordomo's Chest.
Chromatic Cloak crafted from Pattern: Chromatic Cloak which is aquired from Knot Thimblejack's Cache in Dire Maul (North).
Onyxia Scale Cloak crafted by leatherworkers who have turned in the quest from Onyxia's Head.

Rings:
Dragonslayer's Signet reward for turning in Onyxia’s Head.
Seal of the Archmagus
Seal of Ascension obtained from doing quest to complete an Unadorned Seal of Ascension you can find information on the seal quest here.
Tidal Loop reward for completing a quest line started by visiting Duke Hydraxis in Azshara, the first quest in this chain is Poisoned Water
Dimly Opalescent Ring drops off the last 5 bosses in Scholomance except Gandling. Has random enchantment, of fire resistance, of arcane resistance, etc.

Trinkets:
Hyper Radiant Flame Reflector crafted by Schematic: Hyper Radiant Flame Reflector which drops off Solakar Flamewreath in UBRS. (only Engineers can wear them)
Royal Seal of Eldre'Thalas received from getting your class book dropped in Dire Maul and bringing it to the Library in Dire Maul North.
Smoking Heart of the Mountain crafted by Formula: Smoking Heart of the Mountain which is dropped off rare spawn Lord Roccor in BRD. (only Enchanters can wear them)
Ward of the Elements received from completing part of the Onyxia key quest.
Onyxia Blood Talisman reward for turning in Onyxia’s Head.

Weapons, Shields & Offhands

2 Handed:
Smoldering Claw drops off any of the drakes in Temple of Atal'Hakkar (Sunken Temple).
Kindling Stave drops off Pyromancer Loregrain in BRD. (rare spawn)
Blackfury crafted by Plans: Blackfury which is sold by Lokhtos Darkbargainer in Grim Guzzler (bar) in BRD. (must be exalted with Thorium Brotherhood).
Finkle's Lava Dredger found in Majordomo Executus' chest.
Elemental Mage Staff world BoE drop off mobs level 58+.
Amberseal Keeper drops off Lord Kazzak.
Staff of the Qiraji Prophets drops off The Prophet Skeram in AQ40.

1 Handed:
Alcor's Sunrazor BoE world drop off mobs level 58+.
Ebon Hand crafted by Plans: Ebon Hand which is sold by Lokhtos Darkbargainer in Grim Guzzler (bar) in BRD. (must be exalted with Thorium Brotherhood).

Offhand:
Basilisk Bone BoE world drop off mobs level 45+.
Father Flame Obtainable from UBRS, requires walking through the egg room and starting the event to kill the UBRS boss Solakar Flamewreath. Can be done only once per raid.
Magebane Scion quest reward from a long quest chain that starts with Sister Pamela.
Skull of Burning Shadows drops from Maleki the Pallid in Strathome. (dead side)
Magmus Stone drops off Magmus in BRD.

Wand:
Flaming Incinerator drops off of Hydromancer Velratha in Zul'Farrak.
Torch of Austen BoE world drops off mobs level 40+.
Crimson Shocker drops off Shazzrah in Molten Core.