WowAce

Adds your damage to Scrolling Combat Text

Keeps track of durability and pops up a dialog to repair when you go to a vendor who can.

Helps you automate selling stuff.

A UI for searching the guild roster.

FuBar_uGuild

FuBar_AmmoFu

Adds options to create customized layouts from within grid.

Toolset for tanks, providing information on taunts and other valuable information.

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

PoisonMenu

RoleCall allows you to easily see the talent specs and roles of everyone in your group.

Adds resurrection and soulstone status to Grid, using LibResComm-1.0.

EnchantList

NextStep

Tools for MultiBoxers or Group questing/leveling

ColaLight

Tracks whispers and conversations

Timerbar embeddable library

Group interrupt cooldown tracking.

FuBar_RecapFu