WowAce

Displays a reliable cooldown timer for the Shaman Ascendance ability

Tracks and announces interrupts (eg. Hit/Miss/Immune) and is also able to track and report "wasted" interrupts (those which d...

OneBag is a replacement for the default game bags that combines all the bags into one frame.

BossList

RapidCast

Tracks interrupts

Lists Pots and Herbs you got on all chars and allows you to specify color coding

SacredBuff_Mounts

SpellWatch

Shows who controls Wintergrasp and the time until the next battle.

Adds 3 corner indicators to each corner of the Grid frames.

Keeps track of honor, PvP statistics, BG Marks, and Arena points.

Data broker for keeping track of your Ankh cooldown.

Displays a variety of useful stats for tanking

KC_PlayerFramePlus

GatherHud for GatherMate2 with Routes support

Fixes strata bugs in UI windows

View all your Auctions on any DataBroker display.

Never forget which one in that 5-mob pull casts what spell again.

Lists and/or reminds people missing flasks or food buffs at every ready check.