WowAce

LibRockConsole-1.0

Shift-clicking on a user name in chat shows a tooltip with their whois information.

Baggins_ItemRack

tekProber

Opens professions and shows their skill level.

FuBar_EpicCountFu

TalentWhisper

Shows the number of battle resurrections you have and when the next one will become available during a boss encounter.

Adds cooldown timers to your trinket procs

AvionComicMedia

Mail plugin for any DataBroker display.

Zone text Data Broker plugin.

Notifies the raid when someone is Dazed.

Notifies you of new calendar event invites and reminds of upcoming events on all characters and realms

Write event handlers in a simple GUI in-game

Fudge

Will try to keep track of what a character did last time it was logged in

Adanced Achievement Tracker is a smal tool to track Achievements

Status indicator that shows if a unit is hostile (probably mindcontrolled)

Compact scrolling vendor frame