WowAce

Simple, light-weight, LDB-enabled timer that tracks how long you spend in combat

Provides information about the player's bodyguard.

Embeddable chat throttling library with traffic shaping and priorities

Simple and clean Death Knight displays

Captures chatframe Tradeskill Links for later reference in an easy to read format

A simple range indicator for optimizing Halo damage.

A DPS Data Broker plugin.

Fixes strata bugs in UI windows

Buffalo2

Gives equipped and overall iLvl to indicate the quality of a character's gear.

A tool to appraise, estimate, or judge your equipment against the equipment of others.

Saves contents of your guild bank and sends/receives updates over the addon channel

Adds a button to your character and inspect window that shows a summary of gear enchants and gems.

Adds achievement reminders to BigWigs

ArenaPointer

Posts a BigBrother-QuickCheck to the raid-channel when a readycheck is started

Hemlock

Timerbar embeddable library

FuBar_CheckStoneFu

Collect data about you myth+ challenges