WowAce

Speeds up triggering actions such as items or spells by triggering them on key/mouse down rather than release

Hourglass

Drops the least valuable item in your bags to make space.

Shows a money overview for your current realm in the tooltip on the money in your bags

Displays online guild mates.

Set the clicking action for Grid buttons

Displays a grid of guild ranks versus permissions.

Manager for DKP points. Requires DKP - Bidder as main Graphic User Interface.

ItemRackFu

Simple library that handles multiple levels of logging.

Sets the DND flag, when are in combat.

A library to handle rearrangement of blizzard's frames when bars are added to the sides of the screen.

FuBar_GCInFu

Keeps a list of all items you want and shows how much you need.

ShammySpy

Dropin replacement library for SetBackDrop

MultiTips

Reverse Engineering will drill down and search your tradeskills for their elements

Rawrkitty

Displays information about the current zone on the World Map