WowAce

Cartographer_Mining

Used to visualize and change values of variables/variable-trees in game

Scans your Equipment for cumulative item bonuses and sums them up.

Shows learned recipes of all characters.

GatherHud for GatherMate2 with Routes support

Keeps track of resurrection spells cast in a group

Cryolysis

Tooltip scanning library.

Adds indicators to the sides of Grid frames.

RaidAgent

Quest helping: fetching items to use, that sort of thing.

FuBar_FuXPFu

Gives a score for your kit allowing easy comparison with others, also colour codes kit based on appropriateness for your level.

Tracks whispers and conversations

View any characters bank and bags from anywhere. Stores items in Baggins submenu "Anywhere Bags."

Information display for Hunters.

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

Meeuuuh

Talismonger-3.0

Adds a confirmation dialog when crafting Bind-On-Pickup trade skill items