WowAce

Marks ignored players in Grid2 with a color and text notification

Broker plugin for the Blizzard Equipment manager

RBM_DrumWatch

FriendlyArrow

FuBar_HealthstoneFu

AuctionProfit saves information from your invoice auction house mails.

Hides reagent counter on action buttons when you have a glyph that removes reagent requirement.

GnomeCruncher

BlizUF_LMH4

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

Automate talking with the chatty gnome at Chimaeron's lair

Enables shift-click copy into the chat edit box for achievement statistics.

allows you to flip cards of omens by spinning your mouse wheel; counts cards opened and money earned per session and lifetime

Count and Track Daily Quests

Helps to find other player's alts.

VitalWatchOptions

Grid status module that shows the remaining value of any effect tracked by AbsorbsMonitor

LibQuickHealth-2.0

Show an "alternate power" bar for boss encounters.

Simple search inspired by vBagnon