WowAce

Tracks your keystones

FuBar_PoisonReminderFu

Cartographer_Routes

Litmus

Monitors for friendly deaths and announces them as in Myth: The Fallen Lords

Enable/Disable addons for your character in game

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

Automatically leaves the global channels when inside an instance/raid and restores them when exited.

Heads-up minimap display

Replacement for default Rune Frame and more.

Assister

Fires events whenever a raid member "fails".

FuBar_RaidBuffFu

GemCensus inspects people and records which gems they have socketed. Then displays which gems are the most popular.

LCDs for WoW

SmartyCatManaBar

Rewrite myBindings. An enhanced key bindings interface.

Simple library that handles multiple levels of logging.

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

Desesperated announcing to clearly show the skillings of act inplay.