WowAce

CharacterInfoStorage

mDarkPact

Create reagents easily

Tell you where all the daily elite pets are

Scans your Equipment for cumulative item bonuses and sums them up.

Adds your name to chat messages

Timerbar embeddable library

EnchantList

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

XP and Reputation bars

Visual loot monitor

A library to help with localization of Archeology dig sites

FuBar_TinyTipFu

TGuildFrame

AltClick an item in your bag to add it a mail, auction, or trade frame, and alt-click to buy a stack if reagents.

Good old LibTourist-3.0 for WoW Classic Era

WF3sec

Tells you who bought your auctions.

opens/closes all bags when at merchant (instead of only the backpack)

Provides information of tradeskill and crafting materials that are in the banks and bags of your characters.