Dual Wield (WoW)  

The ability to wield a combination of two weapons, one in each hand. Main hand one-handers must always go in the main hand, Off hand one-handers must always go in the off hand, and one-handed weapons can go in either hand.

Currently, the classes that can dual wield are Hunter (level 20), Rogue (level 10), Warrior (level 20, Shaman (30 points in enhancement tree), and Death Knight (presumably upon creation).