WowAce

Creates a broker plugin for all your broker launchers

Allows the user to customize the the tooltip with lua-scripts

Shows a nice Soulstone Monitor.

Displays online friends.

Simple library that handles multiple levels of logging.

FruityLoots

Visual loot monitor

Auto sizes frame layout depending on group/raid size or predefined zone data

Configuration library

FuBar_CheckStoneFu

Quest library for mob location and other information

A tool to appraise, estimate, or judge your equipment against the equipment of others.

JasonQuest

Gives a Smoother Quest Experience

A popup menu containing user-programmable scripts.

Battleground Timers in a HUD around the Blizzard BG status

DotDotDot

Adds on-screen buttons for the farming tools and seeds.

Keeps track of resurrection spells cast in a group

Provides information of tradeskill and crafting materials that are in the banks and bags of your characters.