WowAce

Allows you to loot BoP items without prompting when not in a group or raid

Keeps track of gold and cash flow across multiple characters

Shows you which bosses you've killed next to the raid finder frame.

Building a Better Mailbox

Shows a circle on the minimap to indicate spell range

Go quick, or go home!

Create reagents easily

Fires events whenever a raid member "fails".

FuBar_TinyTipFu

Combat log replacement

Quickly assign the highest follower to each building or unassign all of them.

DogChow

Sniff

Embeddable library to track raid/party roster

"Shows Call To Arms status in an LDB data provider."

PiraPlex

Track of your tradeskills across characters, create small buttons for them and track cooldowns.

Allows the user to customize the the tooltip with lua-scripts

FuBar_AnkhTimerFu

Provides more visible access to dungeon and raid difficulty settings via FuBar.