WowAce

Role playing AddOn that shows extra information about characters as entered by the player.

Set and manage character notes that are displayed in unit tooltips and /who results.

pDebuffList

Says random things in chat when casting any spell or ability. Type "/ss help" for the user's manual.

FuBar_MicroMenuFu

YssGuildShop

FuBar_TransporterFu

FuBar_ExperienceFu

Shows ZoneInfo on the World Map in a perfectly cromulent fashion.

Plays sound when a ready check, LFG queue, battleground queue, or world battleground queue pops even if you have sounds turne...

A data broker display, that shows one block per plugin.

BiGOpt

Heads Up Display with Player and Target Info

Dims action buttons.

Good old LibTourist-3.0 for WoW Classic Mists of Pandaria

MainAssist

Deathknight Rune Display

Cartographer_Mining

Toggles WoW to the forground on events.

Library providing mappings between trade skill recipes, spells and created items