WowAce

Simplistic addon to load Talented on demand

Check for flask/food buffs

Takes a screenshot when you kill a boss or gain an achievement

AlchemyList

switches Bartender4-profiles when changing spec

PowerPoint goodness for your addon

Blocks all whispers except from people in your guild and friends list.

Praise the Sun! \[T]/

Auto sizes frame layout depending on group/raid size

Nostalgia

Crit stat monitoring and adds more detail to paper doll.

Marks the Balcony adds in the Horridon encounter

RBM_BlackTemple

Small Diamond Icon Pack for Cartographer

Automatically promotes a group of players to calendar event moderators.

Adds tooltip for debuffs (and other things? you found out: no).

Minimalistic LibDataBroker-based guild display

DKPmon_BossAuction

Removes HP buffs when Infest debuff hits player.

Clock plugin for any DataBroker display.