WowAce

Never forget which one in that 5-mob pull casts what spell again.

Stores a browsable database of spells that mobs cast

MoBuffs

Modality

Mode7

Mode7Test

Shows Ctrl/Alt/Shift indicators in the middle of your screen.

Adds a highlight border to items in your MogIt Wishlist, making them easier to see.

Yet another suicide kings addon

Improved Quest Tracker

Shows a money overview for your current realm in the tooltip on the money in your bags

Monk Brewmaster/WindWalker Priority and Buff/Debuff Tracking Tool

MonkeyPirate

Simple LibDataBroker based launcher to toggle MonkeyQuest.

MoodMusic

Moolah

MoreActionBars

MorgBid

Client for allowing the raid leader to gauge interest on items in a method similar to a ready-check.

MorgDKP