ItemRack is the a World of Warcraft Mod that lets you build various wardrobe and armor sets and change them with a single click.

This wow mod created by Gello now makes it much easier to switch weapons.

ItemRack lets you construct sets of equipment, and allows you to switch them based on hotkeys, events, or menu activation.

No more forgetting a valuable peice of resistance gear when swapping out. Manage your attire with this fantastic World of Warcraft UI addon.

You can add equipment slots to a bar and mouseover on the bar. This will create a menu of all items in your bags that can go in that slot.

http://wow.curse.com/downloads/details/1482/