WowAce

Allows the user to preview and track their progress in the collection of various transmogrification appearance sets

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

Quest History tracker and shows lists of quests in each category

Unit Frames of awesomeness. Woof. It'll bite your face off.

Displays the locations of Garrison music scrolls.

Death analysis tool

Calculates optimal reforging for given weights/caps.

Database of Vendor locations for HandyNotes

Food/water macro generator

Good old LibTourist-3.0 for WoW Classic Era

Shows you a much bigger icon selection frame

A replacement tradeskill window

Compact rune and proc display for Death Knights.

Wowhead Data dump for GatherMate

A library to provide mobIDs for bosses.

Database of Trainer locations for HandyNotes

Simple and super light-weight tracking of profession links for all your alts.

Display front-end for LibGuildPositions-1.0 using HandyNotes

OneBank3 will combine all the bank bags into one frame.

Utility library with shared functions and data for various addons by NeoTron.