WowAce

Shows guild and system message of the day only if either one of them has changed since the last login.

Automatically restock items from vendors and your bank

Frame layout manager for side panels.

Melee stats Data Broker plugin.

Allows frames to be dragged around, without permanently changing their position.

Invite lots of players in the raid browser for world boss groups

CrossRealm

Welfare Epics

LibQTipClick-1.0

TickTo

Improved Mailbox

Color player names in chat by their corresponding raid class colors

FuBar_combatTextFu

Show a bar indicating the remaining lifetime of your temporary pet

FuBar_GemWatchFu

Alert your friends when you ding, get an achivement, or get phat lewts!

SEasyRotation

ShammySpy

Reverse Engineering will drill down and search your tradeskills for their elements

FuBar_PvpFu