WowAce

Calculates incoming damage avoidance and mitigation

Reputation Statistics - Gained, Needed, Rep/Hr, Session Time, etc.

opens/closes all bags when at merchant (instead of only the backpack)

Checklist and notes addon.

AutoAcceptInvite

Adds 3 corner indicators to each corner of the Grid frames.

Lexan

View all your Auctions on any DataBroker display.

Animated target indicator

Customize the PlayerPowerBarAlt display

kgPanelsConfig

Swap a random tabard every time you visit the bank if you are wearing one

Never forget which one in that 5-mob pull casts what spell again.

TwiCo

Show a rough range indicator

Displays events from Calendar for upcoming week in tooltip.

TrickOrTreat

Shows the price of a single item in the Auction House.

LibRockComm-1.0

InventoryLib