WowAce

Will try to keep track of what a character did last time it was logged in

Helper addon for the Zul'Drak daily "Troll Patrol: The Alchemist's Apprentice"

Adanced Achievement Tracker is a smal tool to track Achievements

Mail plugin for any DataBroker display.

Echos quest objective completion to your party

Monitors the combatlog identifying players from the oposite faction near you.

Reputation tweaking module for TweakHub with auto watched faction selection and detailed rep info updates.

Broker add-on for GemHelper

Provides a virtual keyboard of extended-ASCII and Unicode characters which can be inserted into text areas.

MonkeyPirate

Reserve raider tracking for EPGP.

Status indicator that shows if a unit is hostile (probably mindcontrolled)

LibStickyFrames-1.0

LFD status via a DataBroker display rather than the minimap.

Add in keybindings to place raid marks on mouseover, or the target if there is no unit being moused over

Adds cooldown timers to your trinket procs

BiGOpt

Uses TomTom to show target location if target is in party or raid.

LDB display of the players current damage percent modifier

Shows a frame to track your Pyrite debuff on Flame Leviathan and it's trash. Completely based on MalygosStacks by Nebula.