Warforged have racial archetypes, usually tied to their martial purpose, but not necessarily.
Soldier of the Last War (Fighter archetype)
To many, the words "warforged" and "fighter" seem almost synonymous. Built to serve as soldiers, warforged are indeed singularly suited to the persuit of the combat arts. The warforged fighter who gives up some of that class's range of options, however, gains a stability in combat and a greater command of his construct body
Battle Hardened (Ex)
A warforged fighter is crafted for battle, ready to act at a moment's notice. They gain a bonus to initiative checks equal to their Bravery bonus on saves against fear effects.
This ability replaces the bonus combat feat gained at 1st level.
Bonus Warforged Feat
A warforged fighter can select any warforged feet for which they meet the prerequisites in place of a bonus combat feat.
This ability modifiers the fighter bonus feats class feature.
Body as Weapon (Ex)
At 5th level, a warforged fighter gains a +1 bonus on attack and damage rolls on any of his natural attacks, or with any weapon attached as a warforged component or integrated weapon. They also add this bonus on any CMB checks made with these weapons, or to their CMD against manouvres using these weapons. This bonus increases by +1 every four levels thereafter.
This ability replaces Weapon Training I.
Machina ex Deus (Paladin archetype)
The rare warforged who takes up a paladin's path likely follows no deity. With no assurance of divinity or even the existence of their own souls, warforged paladins often follow a simple faith of good will. Believing in the necessity for just and benign behaviour and the benefits of living in such a fashion, these warforged paladins can gain abilities uncommon for the class and unique to their race.
Smite Construct (Su)
A warforged paladin can use their smite evil ability against a construct, gaining a bonus on their attack and damage rolls as if smiting an evil creature, regardless of the construct's alignment.
This ability modifies the Smite Evil class feature.
Durable Will (Su)
At 2nd level, a warforged paladin gains a bonus equal to their Constitution bonus (if positive) on Will saves.
This replaces Divine Grace.
Repair Damage (Su)
Beginning at 2nd level, a warforged paladin can repair damage dealt to any Construct or living construct (including themselves) by touch. Each day they can use this ability a number of times equal to 1/2 their paladin level plus their Constitution modifier. With one use of this ability, a paladin can heal 1d6 hit points of damage for every two paladin levels they possess. Using this ability is a standard action, unless the paladin targets themselves, in which case it is a swift action. A paladin only needs one free hand to use this ability.
Alternatively, a warforged paladin can use this ability on living creature, however it only heals half the HP it would normally. Unlike Lay on Hands, this ability cannot be used to deal damage to undead.
This ability replaces the standard Lay on Hands ability.
Immunity to Stunning (Ex)
From 3rd level on, a warforged paladin cannot be stunned. This ability replaces Divine Health.