The Barbarian's skill set has been radically altered numerous times since it was first revealed. As of April 2012 there are 22 active skills, which can be divided into those skills which generate Fury, those which spend it, and those which are situational. There are an additional 16 passive skills.
Active Skills:

Bash (required level: 1) - Brutally smash an enemy for 150% weapon damage with a 20% chance to Knockback. Generates 6 Fury per attack.
Hammer of the Ancients (required level: 2) - Call forth a massive hammer to smash enemies directly in front of you for 200% weapon damage. Hammer of the Ancients has a 5% increased chance to critical hit. Costs 20 Fury.
Cleave (required level: 3) - Swing your weapon in a wide arc to deal 120% weapon damage to all enemies caught in the swing. Generates 5 Fury per attack

Ground Stomp (required level: 4) - Smash the ground, stunning all enemies within 12 yards for 4 seconds. Generates 15 Fury & has a cooldown of 12 seconds.
Rend (required level: 5) - A sweeping strike causes all nearby enemies to Bleed for 210% weapon damage as Physical over 3 seconds. Costs 20 Fury.

Leap Attack (required level: 8) - Leap into the air, dealing 85% weapon damage to all enemies within 8 yards of your destination and slowing their movement speed by 60% for 3 seconds. Generates 15 Fury & has a cooldown of 10 seconds.

Ancient Spear (required level: 9) - Throw a spear to pull an enemy back to you, briefly slowing the target's movement by 60% and dealing 185% weapon damage. Generates 15 Fury & has a cooldown of 10 seconds.

Frenzy (required level: 11) - Swing for 110% weapon damage. Frenzy attack speed increases by 15% with each swing. This effect can stack up to 5 times for a total bonus of 75% attack speed. Generates 3 Fury per attack.

Seismic Slam (required level: 12) - Slam the ground and cause a wave of destruction that deals 155% weapon damage and Knockback to targets in a 45 yard arc. Costs 30 Fury.
Revenge (required level: 13) - Revenge has a 15% chance to become active each time you are hit. Inflict 220% weapon damage to all nearby enemies. You heal 5.0% of your maximum Life for each enemy hit.
Weapon Throw (required level: 14) - Hurl a throwing weapon at an enemy for 120% weapon damage and Slow the movement of the enemy by 60% for 2 seconds. Costs 10 Fury.
Sprint (required level: 16) - Increase movement speed by 40% for 6 seconds. Costs 20 Fury.
Threatening Shout (required level: 17) - Shout with great ferocity, reducing damage done by enemies within 25 yards by 20% for 15 seconds. Costs 15 Fury & has a 15 second cooldown.
Earthquake (required level: 19) - Shake the ground violently, dealing 2000% weapon damage as Fire over 8 seconds to all enemies within 18 yards. Costs 50 Fury & has a cooldown of 120 seconds.
Whirlwind (required level: 20) - Deliver multiple attacks to everything in your path for 110% weapon damage. Costs 16 Fury.
Furious Charge (required level: 21) - Rush forward knocking back enemies and inflicting 195% weapon damage to enemies along the path of the charge. Costs 15 Fury & has a cooldown of 10 seconds.

Battle Rage (required level: 22) - Enter a rage which increases damage by 15% and Critical Hit Chance by 3% for 30 seconds. Costs 20 Fury.
Ignore Pain (required level: 22) - Reduces all damage taken by 65% for 5 seconds. Cooldown: 30 seconds.
Call of the Ancients (required level: 25) - Summon the ancient Barbarians Talic, Korlic, and Madawc to fight alongside you for 15 seconds. Each deals 60% weapon damage per swing in addition to bonus abilities:
Talic wields a sword and shield and uses the Whirlwind skill.
Korlic wields a massive polearm and uses the Cleave skill.
Madawc dual-wields axes and uses the Weapon Throw skill.
Costs 50 Fury & has a cooldown of 120 seconds.
Overpower (required level: 26) - Deal 165% weapon damage to all targets within 9 yards. Landing a Critical Hit has a chance to lower the cooldown by 1 second. Has a cooldown of 15 seconds.
War Cry (required level: 28) - Unleash a rallying cry to increase Armor for you and all allies within 50 yards by 20% for 60 seconds. Generates 30 Fury & has a cooldown of 30 second.
Wrath of the Berserker (required level: 29) - Enter a berserker rage which raises several attributes for 15 seconds:
Critical Hit Chance: 10%.
Attack Speed: 25%.
Dodge Chance: 20%.
Movement Speed: 20%.
Costs 50 Fury & has a cooldown of 120 seconds.
Passive Skills:
Pound of Flesh (required level: 10) - Increases the chance of finding a health globe by 25% and you gain 100% additional health from health globes.
Ruthless (required level: 10) - Critical hit chance increased by 5%. Critical hit damage increased by 50%. Many skills and runestone effects rely on critical hits to trigger their effects.
Nerves of Steel (required level: 13) - Your defense is increased by 100% of your Vitality.
Weapons Master (required level: 16) - Gain a bonus based on the weapon type of your main hand weapon:
- Swords/Daggers: 15% increased damage.
- Maces/Axes: 10% chance to critical hit.
- Polearms/Spears: 10% attack speed.
- Mighty Weapons: 3 Fury per hit.

Inspiring Presence (required level: 20) - The duration of your shouts is doubled. After using a shout you regenerate 1% of your maximum Life per second for 60 seconds.Your shouts are:
Battle Rage.
Threatening Shout.
War Cry.
Berserker Rage (required level: 20) - You inflict an additional 25% damage while at maximum Fury.
Bloodthirst (required level: 24) - Gain 3% of all damage done as Life.
Animosity (required level: 27) - Increases Fury generation by 10% and maximum Fury is increased by 20.
Superstition (required level: 30) - Reduces all non-physical damage by 20%. Whenever you take damage from a ranged or elemental attack you gain 3 Fury.
Tough as Nails (required level: 30) - Increases armor by 25%. Thorns damage dealt increased by 50%.
No Escape (required level: 35) - Increases the damage of Ancient Spear and Weapon Throw by 10%. In addition, a Critical Hit with Ancient Spear resets the cooldown while Critical Hits with Weapon Throw have a chance to return 14 Fury.
Relentless (required level: 40) - While below 20% Life, all skills cost no Fury and all damage taken is reduced by 50%.
Brawler (required level: 45) - As long as there are 3 enemies within 8 yards, all of your damage is increased by 30%.
Juggernaut (required level: 50) - The duration of control impairing effects on you are reduced by 20%. In addition, whenever a Stun, Fear, Immobilize or Charm is cast on you, you have a chance to recover 15% of your maximum Life.
Unforgiving (required level: 55) - You no longer degenerate Fury. Instead, you gain 1 Fury every 2 seconds.
Boon of Bul-Kathos (required level: 60) - The cooldown on your Earthquake, Call of the Ancients, and Wrath of the Berserker skills is reduced by 30 seconds.
