Extra Smiting( Complete Warrior, p. 98)
You can make more smite attacks.
base attack bonus +4, Smite ability,
When you take this feat, you gain two extra attempts to smite per day. Use whatever smite ability you have (the paladin's smite evil ability or the hunter of the dead's ability to smite undead, for example).
You can take this feat multiple times, Its effects stack.