WowAce

Hide frames of people you've ignored.

I've invented a device that tells you when reactive abilities are available!

FuBar - CAFu

Marks ignored players in Grid2 with a color and text notification

DKPmon_HellbenderDKP

Artifact power bar support for oUF layouts

Show a bar indicating the unit's Holy Power count.

Adds a /rl command to reload the UI

Auto sizes frame layout depending on group/raid size

Uses linear regression and a log of hitpoint values to estimate how long a boss has left to die and reach execute range.

Creates an Auctionator's shopping list with all recipes your alts need based on Altoholic data.

Adds spell-based range checking to Grid, and the ability to check multiple ranges.

Medley

Simple loot specialisation display with selection in tooltip.

Addon to add macro support for setting and clearing raid icons

Mana regen rate display.

Mini calculator

Raid tracker for Asmodeus

Reminds you to resummon your Ghoul

Warn players about a specific aura (buff/debuff) at a specific stack via whispers and icons.