As there is no compilation yet of which boss drops what items currently, it might be nice to make a list.
When an item is 'discovered' on db.mmo-champion.com or wowhead I will provide a link to there as well
btw. if you know more drop locations of items, post them and I will add them to the list
Grim Batol
General Umbriss
Modgud's Blade (caster Dagger)
Forgemaster Throngus
Wand of Untainted Power (Wand)
Drahga Shadowburner
Azureborne Cloak (caster cloak - crit)
Erudax
Wild Hammer (2H Mace - strength/haste)
Corrupted Egg Shell (Caster - spirit)
Halls of Origination
Temple Guardian Anhuur
Anhuur Hymnal (?)
Awakening Footfalls (caster plate)
Anraphet
Omega Breastplate (caster plate)
Alpha Bracers (caster plate)
Earthrager Ptah
Robes of Rampant Growth (caster cloth)
Seedling Pod (physical dps neck - str/haste/hit
Ammunae
Mouth of the Earth (dps necklace - agi/exp)
Breastplate of the Risen Land (dps plate - str/crit)
Setesh
Chaotic Wrappings (dps mail - agi)
Scepter of Power (caster 1H mace)
Helm of the Typhonic Beast (caster cloth)
Helm of Setesh (tank plate - dodge/expertise)
Isiset
Nova Band (dps ring - str)
Rajh
Sun Strike (1H sword - hit/mastery)
Band of Rays (caster dps ring - hit/crit)
Fingers of Light (tank plate - parry/mastery)
Blade of the Burning Sun (caster 1H sword - haste/crit)