Name: ARTERIAL STRIKE
Your sneak attacks target large blood vessels leaving wounds that cause major blood loss
PreReq: Sneak Attack ability, Base Attack Bonus +4
Description: If you hit with a Sneak Attack, you may forgo +1d6 extra damage and instead deliver a wound that won't stop bleeding. Each wound causes loss of 1hp per round until the target receives healing.
Source: CompWar
Category: Rogue

Name: DEADEYE SHOT
You carefully line up a ranged attack, timing it to hit precisely when your opponent's guard is down due to an ally's attack.
PreReq: Point Blank Shot, Precise Shot, Base Attack Bonus +4, skirmish or sneak attack
Description: If you ready a ranged attack to occur when an ally strikes a particular target, and your ally succeeds, that target loses his Dex bonus to AC against your attack.
Source: PHII
Category: Rogue, Scout

Name: DEFT STRIKE
You can find the right place to attack someone.
PreReq: Int 13, Combat Expertise, Spot 10 ranks, sneak attack +1d6
Description: As a standard action, conduct a Spot Check against DC equal to targets AC. If succeed, next attack against target ignores armor bonus and natural armor bonus to AC. Can be ranged attack if within 30 feet.
Source: Drac
Category: Rogue

Name: HAMSTRING
You can wound an opponent's legs, hampering their movement.
PreReq: Sneak Attack ability, Attack Bonus +4
Description: If you hit with a melee sneak attack, you may choose to forgo 2d6 sneak attack damage to reduce your opponent's speed by half until healed.
Source: CompWar
Category: Rogue

Name: STAGGERING STRIKE
You can deliver a wound that staggers an opponent.
PreReq: Attack bonus +6, sneak attack
Description: If you deal damage with a melee sneak attack, you also stagger your opponent for one round (unless it makes a successful Fort save vs DC the damage you dealt). Staggered means it can only perform a partial action.
Source: CompAdv
Category: Rogue

Name: TELLING BLOW
When you strike an opponent's vital areas, you draw on your ability to land crippling blows to make the most of the attack.
PreReq: Skirmish or Sneak Attack ability
Description: When you score a critical hit, you also deal your skirmish or sneak attack damage even if you would not normally qualify to.
Source: PHII
Category: Combat (Melee, Ranged), Rogue, Scout