As completely stupid as it sounds, a Human Ranger with Racial Heritage(Kasatha) can dual wield bows.
Twin Bows (Ex): At first level, a bow nomad can simultaneously wield a combination of two of any of the following ranged weapons: shortbow, longbow, and their composite versions. When a bow nomad makes a full attack with two bows, two-weapon penalties apply and can be offset with Two-Weapon Fighting feats. Since bows aren't light weapons, a bow nomad with Two-Weapon Fighting takes a -4 penalty on attacks with each of her bows. Extra attacks from other sources, such as those granted by Manyshot or Rapid Shot, can be applied to only one of the wielded bows per round. This ability replaces wild empathy.