Flying Tiger( Secrets of Sarlona, p. 117)
You have mastered the style of fighting with two hook swords at the same time, and you can perform astounding maneuvers with them.
Exotic Weapon Proficiency (PH) (Hook sword) , Weapon Focus (PH) (Hook sword) , Two-Weapon Fighting (PH) (or the ability to treat the hook sword as a special monk weapon) , DEX 15, Base attack bonus +1,
When taking a full attack action with your hook swords, you can hook the long ends of the weapons together or unhook them as a free action. While the swords are hooked together, they deal only the lower of their two damage dice but they also act as a reach weapon that can be used to attack adjacent foes.