WowAce

Creates virtual cyphered chat channels over guild addon communication channel.

Display bag usage on each of your bag slots.

Adds talent specialization role status to Grid.

Friends & Guild Data Broker plugin.

Reorients the camera to be behind the character after a charge.

Manages the SavedVariables of your addon with a layered hierarchy of settings.

Tools for MultiBoxers or Group questing/leveling

Tells you if you're buffed

OneBag is a replacement for the default game bags that combines all the bags into one frame.

Add-on that shows which battle pets can be farmed this week

cyCircled

Battleground Timers in a HUD around the Blizzard BG status

Expo

Resizes some default UI frames (GuildUI, LootFrame, RaidInfo, TradeSkillUI and TrainerUI) to show more lines

Simple and clean Death Knight displays

Aspect checker addon for Hunters.

Healer gear benchmark

Tankalyze

Displays reagent count on spell action buttons

SysMon plugin for any DataBroker display.