WowAce

Adds "line of sight" status to Grid (after the error occurs).

A library to convert a post-formatted string back to its original arguments given its format string.

Tattles to your default chat frame who has used their taunt nearby

Marks ignored players in Grid2 with a color and text notification

RC4Lib

BabiiSkulls

What actual item level is an item? Yes, it's horrible we need a library for this.

Lua error manager

Shows the number of battle resurrections you have and when the next one will become available during a boss encounter.

Track friends / enemies in a convienent window, with optional logging

Checks .lua files for excess and/or involuntary global variable access. NOT AN ADDON.

Notifies the raid when someone is Dazed.

A gnome sized calculator.

Helps to find other player's alts.

Status for self

Experience is an addon that helps you evaluate another player's dungeon experience.

Steroids

Serialized

A library to convert internal MountId to SpellId

Adds simple coordinates to minimap frame