there is a feature at Drow of the Underdark that does that for drow fighters it can be taken at fighter level 1 (you must give up heavy armor and shield proficiencies) and you add your dexterity bonus to attacks up to 30 ft to flat-footed opponents. it also gives +2 at initiative checks.
there was an other feat at a 3rd edition book (i think it was in "Feats"), superior winesse that allowed you to add your dexterity to your melee attacks.
hope i could help, i'll see if i can find anything else