WowAce

FuBar_tTracker

A seperate focus bar, with focus gain prediction and rotation forecast.

Lists and/or reminds people missing flasks or food buffs at every ready check.

FuBar_ExperienceFu

Display an arrow that points to a raid/party member anchored to raid frames

A 'channeling spell'-tracking addon for Affliction Warlocks. Drain Soul, Drain Life/Harvest Life and Malefic Grasp.

SwapMagic

Provides extended aura status settings.

Clean looking square minimap with many options.

Display the global cooldown around your cursor. (+ other stuff)

Adds an Atlas button to FuBar.

A library to handle rearrangement of blizzard's frames when bars are added to the sides of the screen.

A Data Broker plugin to show AddOn memory usage.

A customizable casting bar replacement for TBC Classic & Classic WoW

SpellWatch

xchar

Instant PROC notification

Constructs a SimC export string for an item without equipping it

Keep your pet fed

Information display for Hunters.