WowAce

EnchantList

Hides MicroButton Alerts

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

Welfare Epics

MoBuffs

Records mail when visiting the mailbox to make keeping track of mail and expiration dates easy.

Embeddable library to track raid/party roster

Upcoming events.

OneChoice tries to help you reduce quest reward choices down to, ideally, one choice.

Shows the group leader, raid assistants, and master looter in Grid.

Keeps track of people who have recently sent you messages.

A Perl layout with oUF.

PlayerNotes

For Developers (of Addons which uses LibWho-2.0): show queues and queries in realtime

Communicates with guild members for their positions on the world map

FuBar_AlarmClockFu

Spyglass

AbacusLib

QR Code builder library

Tracks interrupts