WowAce

Co-ordinated targetless Party and Raid wipe recovery. Evolved

Track all threat redirection ability transfers and cooldowns (Misdirection and Tricks of the Trade).

Show vignette icons sooner

Bind spells, items, and macros to keys, without using action buttons

MorgDKP

A library to provide information about zones and instances.

FuBar_HonorFu

DKP system for all guilds in the Banana Republic.

Reports in raid chat whenever a raid member "fails." /EnsidiaFails to configure.

A replacement tradeskill window for Classic

A Friend-Enemy-Unit-Frame for battlegrounds.

tracks and share quests between your party

Displays Pet Info for Hunters and Warlocks. Also keeps track of Stables and Pet and Demon skills.

MendWatch

FuBar_TrainerFu

A Collection of Automations and Interface Tweaks.

A library to help with localization of item types and subtypes.

Improved Questing Experience

Food/water macro generator

Teleporters in Suramar? Sure, why not?