WowAce

Good old LibTourist-3.0 for WoW Classic Mists of Pandaria

Adds various information based on PeriodicTable to item tooltips.

Numerical and graphical display of Combo Points and similar buffs/debuffs. Also tracks Holy Power and Soul Shards.

Marks the locations of Hallow's End candy buckets on the worldmap and minimap.

CT_RaidAssist style raid frames

Displays information about the current zone on the World Map, for WoW TBC Classic

an embeddable library providing an abstraction layer for tracking and querying Blizzard's Nameplate frames with ease and effi...

XP bar using Ace3.

Enhances the default AddOns list.

Archaeology Assistant

mount and companion manager

StarTip (Tooltips from Outerspace)

Collects Herbs, Mines, Gas Clouds and Fishing locations and adds them to the worldmap and minimap

Tracks the HoTs you cast.

Achievements

Adds mob patrol paths to your map.

Am I locked out? - Displays all RaidIDs for all chars

Tooltip of awesomeness. Moo. It'll graze your pasture.

Keeps account of attendance and loot for raids, parties, bgs, arenas and solo for questing.

Libra