Weapon Focus, Variant (3.5e Feat)
From D&D Wiki
 Weapon Focus [General, Fighter]
A variant of the weapon focus feat that our group uses a lot.
Prerequisite: Proficiency with selected weapon, BAB +1.
Benefit: Choose one type of weapon, and either Dexterity or strength. You can also choose unarmed strike or grapple (or ray, if you are a spellcaster) as your weapon for purposes of this feat. When wielding the selected weapon, you add half of your modifier in the selected ability score (rounded down) to the attack roll.
Special: You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, you select a new weapon. You may also select the same weapon twice, choosing Dexterity one time, and strength the other. A fighter may select this feat as one of his fighter bonus feats.