WowAce

Makes it very easy to collect rare battle pets.

Extends Gladius with diminishing return tracking

Skip the gossip and select the normal NPC action

ChatAssist2Options

FuBar_TraxieFu

Automatically restock items from vendors and your bank

RC4Lib

Fizzlebag

MD5Lib

Displays both Kalecgos and Sathrovarr the Corruptor hit points during the encounter.

agUF style oUF layout

Adds AFK status to Grid frames.

Opens professions and shows their skill level.

LibFuBarPlugin-3.0

Color manipulation library.

GearRating

GCInfo

SpoilsOfWar

Enables cooldown notification between players and allows party members access to each-others spell books.

Sometimes you just want to run around nekkid.