WowAce

Prints a message in your default chat frame when someone in your group gains an aura.

Generate a macro with random mounts

Enhances the Equipment Manager to let you control the helm/cloak visibility for each set.

Adds Name and Buyout Price sort columns to the auction house.

Display an arrow that points to a raid/party member anchored to raid frames

BigTrouble

Shows a nice Soulstone Monitor.

Keeps an eye on someone's distance from you, and alerts you if they get too far.

Keeps track of honor, PvP statistics, BG Marks, and Arena points.

LD50_abar

CombatAnnounce

Profiler of the Lords of the Zodiac guild.

LibDogTag-2.0

A frame with a text that gives you the amount absorb left on target, or in TankMode absorbs left on yourself.

Deformat

TableTopLib

Keeps tracks of /rolls.

Improvements to the standard Blizzard Eclipse bar for balance druids. Use /ebp for the config screen.

Customize the PlayerPowerBarAlt display

Enables you to see Chinese, Japanese and other languages in game