Armor quest are many.
All PoPower and GoD ones are in game.
There is a newbie quest armor in the lobby.
Soltemple (Ginger in lobby) has a set of armor off the vender. These are purchasable with radiant crystals which can be earned by doing quest in soltemple or higher custom content.
There is a ebon vender in Icewell (liberated) he has a set of armor more advanced tehn Soltemple.
There is a high end chain, plate, silk , leather that drops off high end velious content.
There is a set of silk armor that drops in instance Vox raids. Actually 4 sets, 1 per tier. Tier 1 is 70 doable 1 grp and higher take more groups or uber geared single group.
There is a set of healer armor off Naggy instances raids. Higher end Naggy raids drop melee armor.