WowAce

Display front-end for LibGuildPositions-1.0 using HandyNotes

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

Broken in Midnight. I recommend MidnightFocusInterrupt instead.

Raid Frames using the oUF framework.

Switch macro depending on zones or BigWigs boss modules.

GrindStatus

tracks and share quests between your party

A library to provide mobIDs for bosses.

Deathknight Rune Display

Cartographer_Treasure

Shows Status Bars that you can drag around and group up for your cooldowns

Smart mount randomization on a button! Empty coconut halves not included.

provides enchanters with a decent tool for managing their profession

Role playing AddOn that shows extra information about characters as entered by the player.

Easily mail friends, guild members, alts and others

A core for your informational plugins to plug into.

Henge

Compact & customizable filtering, monitoring and grouping of buffs and debuffs

Target Debuff monitor. Stacking aware, giving current and potential debuff status.

Visualises healing.