WowAce

Shows at-a-glance what raid buffs/debuffs you have.

Assist you with faction transfers letting you know which mounts, spells, etc you have and what they will be swapped to.

Tracks Black Market Auction House auctions.

JasonQuest

Adds Raid Target Icon status to Grid (Player or Player Target).

Light-weight enhanced casting bars

CharacterInfoStorage

Adds 3 indicators to each side (top, bottom, left and right).

Displays events from Calendar for upcoming week in tooltip.

KivinConsoleXP

A frame designed for each specialization of druid's watching their main power and important buffs/debuffs

VersionChecker

Transcendence Monitor for Monks

Swiss Army knife for instances, including player tracking, ignore buttons, loot tracking, notes, and more.

LCDs for WoW

ClosetGnome_Banker

Small addon to copy chat lines.

Provides data about all artifacts in the player's possession.

LDB data source displaying character stats

FuBar_FactionItemsFu