Needs review
Source: Book of Exalted Deeds

Description: Whenever you deal a critical hit using a melee weapon with which you are proficient, your opponent must succeed at a Will save (DC 10 + 1/2 your character level your Cha modifier) or cower for 1 round. A monk's unarmed strike is considered a melee weapon for purposes of this feat.

Prerequisites: STR 13, Power Attack, Intimidate (7 ranks)

Required for: Quell the Profane

Whenever you deal a critical hit using a melee weapon with which you are proficient, your opponent must succeed at a Will save (DC 10 + 1/2 your character level your Cha modifier) or cower for 1 round. A monk's unarmed strike is considered a melee weapon for purposes of this feat.

Special

A fighter may select Resounding Blow as one of her fighter bonus feats.