There are 3 repositories under wotlk-backport topic.
DBM for Warmane (Icecrown, Lordaeron, Frostmourne, Onyxia)
Most Useful WoW Addons for Patch 3.3.5a WotLK
Immersive questing addon for World of Warcraft (WotLK-3.3.5a Backport)
Plugin for ElvUI (3.3.5a) - new features and various improvements
World of Warcraft Dragonflight UI for 3.3.5a (Still WIP)
Spell Bonus Action implements the system of bonus spell action introduced in Cataclysm. It allows you to display an "extra" spell to players under certain conditions, directly recorded in the database.
This Version of PallyPower for WoW 3.3.5a introduces several new features
Most Useful WoW Addons for Patch 3.3.5a WotLK
3.3.5a - ElvUI plugin that adds a DataText to change specs and equipment sets.
Event logging addon for 3.3.5a, suitable for boss encounters
NugKeyFeedback (WotLK-3.3.5a Backport)
AddFriend is a simple addon that adds an "Add Friend" and "Invite Guild" option to the context menu of player options.
RaidCluster is an addon designed to display clusters of players as counters that increment when players are close to each other.
Backported Druid EclipseBar but shows eclipses cooldowns animation.