WowAce

Reminds you if your flask/elixir and/or Augmentation Rune and/orfood buff is about to expire or has expired

Provides a quick display for the LFG Call to Arms

Warns you with sounds when you gain different shaman spells.

Filters AFK and DND messages after you've seen them once.

InstanceMaps

A tool to appraise, estimate, or judge your equipment against the equipment of others.

Priority 3 loot announce addon

Displays info about who rolled Need/Greed/Pass on items that are currently rolled for

tekSupport

QR Code builder library

Draws some lovely 3D portraits in the standard Blizzard artwork.

Evaluates your gear

Prompts for canceling of pet battles if no rare pet is found in the opposing team.

Cartographer_Stats

Rep2 displays a message, which shows how much reputation you gained, and how much is needed until the next standing.

Adds Archaeology items to AdiBags virtual groups

Generate a macro with random mounts

Adds a couple of graph displays to Skada.

Makes the Blizzard options frame movable and resizable

PetBar