Barbarian

Barbarian Rage
Barbarian temporarily gains +4 to Strength, +4 to Constitution, and a +2 morale bonus on Will saves, but suffers a –2 penalty to AC.

The increase in Constitution increases the barbarian's hit points by 2 points per level, but these hit points go away at the end of the rage when the Constitution score drops back to normal. While raging, a barbarian cannot use skills or abilities that require patience and concentration. (The only class skills he can't use while raging are Craft, Handle Animal, and Intuit Direction.) He can use any feat he might have except for Expertise, item creation feats, metamagic feats, and Skill Focus (if it's tied to a skill that requires patience or concentration).

A fit of rage lasts for a number of rounds equal to 3 + the character's (newly improved) Constitution modifier. The barbarian may prematurely end the rage voluntarily. At the end of the rage, the barbarian is fatigued (–2 to Strength, –2 to Dexterity, can't charge or run) for the duration of that encounter (unless the barbarian is 20th level, when this limitation no longer applies). The barbarian can only fly into a rage once per encounter, and only a certain number of times per day (determined by level). Entering a rage takes no time itself, but the barbarian can only do it during his action.

Starting at 15th level, the barbarian's rage bonuses become +6 to Strength, +6 to Constitution, and a +3 morale bonus to Will saves. (The AC penalty remains at –2.)

Fast Movement
The barbarian has a speed faster than the norm for his race by +10 feet when wearing no armor, light armor, or medium armor (and not carrying a heavy load).

Uncanny Dodge
At 2nd level and above, the barbarian retains his Dexterity bonus to AC (if any) if caught flat-footed or struck by an invisible attacker.

At 5th level, the barbarian can no longer be flanked. The exception to this defense is that a rogue at least four levels higher than the barbarian can still flank.

At 10th level, the barbarian gains a +1 bonus to Reflex saves made to avoid traps and a +1 dodge bonus to AC against attacks by traps. At 13th level, these bonuses rise to +2. At 16th, they rise to +3, and at 19th they rise to +4.

Damage Reduction
Starting at 11th level, the barbarian gains the extraordinary ability to shrug off some amount of injury from each blow or attack. Subtract 1 from the damage the barbarian takes each time the barbarian is dealt damage. At 14th level, this damage reduction rises to 2. At 17th, it rises to 3. At 20th, it rises to 4. Damage reduction can reduce damage to 0 but not below 0.

Illiteracy
Barbarians are the only characters that do not automatically know how to read and write. A barbarian must spend 2 skill points to gain the ability to read and write any language the barbarian is able to speak.

Ex-Barbarians
A barbarian who becomes lawful loses the ability to rage and cannot gain more levels as a barbarian. The barbarian retains all the other benefits of the class.