WowAce

Shows guild and system message of the day only if either one of them has changed since the last login.

Collects and displays census information. This AddOn is licenced under the GNU GPL, see GPL.txt for details.

Powerleveling guide framework

Allows custom-triggered boss mod timers to be created

Ratings

School

CraftBot

Keeps track of gold and cash flow across multiple characters

Tracks specialization and talent data for group members

What did you just loot?

FuBar_KungFu

PowerDisplay

Makes those pesky garrison animations go away.

Expiration

A noble spirit embiggens the smallest player arrow.

Displays online friends.

BossWhisperer

Makes grid QuickHealth aware

Reserve raider tracking for EPGP.

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