WowAce

Adds a Friendly Fire mode and data collection to Skada.

Tracks and announces interrupts (eg. Hit/Miss/Immune) and is also able to track and report "wasted" interrupts (those which d...

SanityBags

Provides training reminders to help decipher the Blizzard Spell Alerts.

Good old LibTourist-3.0 for WoW Classic Era

Counts stacked lifeblooms and uses progressive colors to indicate the active number of HOTs.

Automatically restock items from vendors and your bank

Crit stat monitoring and adds more detail to paper doll.

Ratings

Really very early stage. No, earlier than that.

FuBar_KCIFu

Adds achievement reminders to BigWigs

Adds notes to item tooltips

Allows for gold tracking across multiple time frames

BagSync

A customizable buff/debuff display replacement for the default Blizzard frames (with right click cancelaura support).

Loooooot!

Upcoming events.

Alert your friends when you ding, get an achivement, or get phat lewts!

Frame layout manager for side panels.