WowAce

Shows simple Buttons for your Cooldowns :)

Remember locations that city guards direct you to for HandyNotes

Reports in raid chat whenever a raid member "fails." /EnsidiaFails to configure.

GrindStatus

Checks your gear before bosses and yells at you if you're an idiot

Quest History tracker and shows lists of quests in each category

LiteStep skins for Masque.

Plugs classical world style fonts into LibSharedMedia-3.0

Automatically enables or disables combat logging based on location.

Bulk mail sending made really easy

Bayi's Extended Questlog

Provides access to all Portal and Teleport spells on right click of one button.

Bulk mail reception made really easy

Shows you a much bigger icon selection frame

Keeps track of HoTs, DoTs, Buffs and Cooldowns. With audio and text alerts to refresh them.

Manufac

XRS

Track all threat redirection ability transfers and cooldowns (Misdirection and Tricks of the Trade).

A blizzard group finder replacement

CandyBar style cooldown display