I like Clustered Shots for Pathfinder. We can do that in melee too!
Many Strikes, One Wound (Combat)
You’ve learned to strike hard and deep instead of the sloppy cuts of an amateur.
Prerequisites: Weapon Focus, Weapon Specialization, base attack bonus +6.
Benefit: When you use a full-attack action to make multiple melee weapon attacks against the same opponent, total the damage from all hits before applying that opponent’s damage reduction.
Special: If the massive damage optional rule is being used, that rule applies if the total damage you deal with this feat is equal to or exceeds half the opponent’s full normal hit points (minimum 50 points of damage).