E
ExpandAssist - enabling the raid assist to do the same as an raid leader
ExoRaidSetup - allows a raid to share graphical representations of boss pulls [Img1]
EzPoison - Rogue Poison Helper [Img1] [Img2]
EasyCloak - Automagically equip Onyxia Scale Cloak when entering Nefarian's Lair [Vid1]
EasyRess - Simplifies chain ressing and drinking
EasyLoot - addon to simplify raid loot distribution
EFCReport - Enemy Flag Carrier report tool [Img1]
Egnar - Show a range indicator for hunters [Img1]
ElvUI - User Interface replacement [Img1] [Img2] [Discord]
EQCompare - Compare equipped inventory items against items in chatframe hyperlink and bags/bank [Img1]
EQL3 - A reskinned Extended Quest Log addon inspired by TukUI [Img1]
EquipColor - colors unequippable items red in the inventory [Img1]
ETL - Exp Per hour/time til level addon [Img1]
EngBags - single bag / bank, the bank's remote viewing (auto-sorting, etc.) [Img1] [Img2]
EnemyFrames - display enemy players on BGs [Img1] [Img2] [Read]
EngInventory - AutoSorting Inventory Replacement [Img1]
EM_CritBam - EasyMachines CritBam Mod
EM Gatherer - displays stuff you gather in your minimap and world map
EM MonkeyBuddy - Helps you configure your MonkeyMods
EM MonkeyQuest - Displays your quests for quick viewing
EM WoWQuote - Receives and transmits sound-quotes
EM Yatlas - Yet another atlas
EVTCalendar - Event Calendar AddOn [Img1]
EavesDrop - A simple combat log that displays events [Img1]
eUI - is a small collection of interface addons [Img1]
ElkBuffBar - Tries to sort buffs into categories with pretty colors (Fails sometimes) [Img1]
eePanels - Create and modify background panels in your WoW UI
EPGPexport - Effort Points/Gear Points Loot System export tool
EzDismount - Dismounts you whenever "Cannot use while mounted" appear
EZ-EPGP - Displays EP/GP ratio in neat frame that can be sorted by clicking on headers [Img1]

F
FeralFire - Customizable WoW attack add-on for Cat Form Feral Druids
FocusFrame - Provides focus targeting & frame support [Img1]
FocusFrame TargetCastbar - Adds an extra castbar for your current target
FelwoodGather - helps you and your team mate with felwood fruit gathering, location and timer management
FishInfo2 - keeps track of which fish you catch in each zone
FishingBuddy - Help with fishing related tasks
FuBar BuffLeecherFu - FuBar-2.0 Plugin that logs you out once you get Onyxia or ZG buff
FuBar ElysiumPopulationFu - fubar plugin to show how many people are online
FuBar_InstanceReset - Keep track of your instance resets
Fubar PossessionsFu - FuBar plugin for Possessions addon
FuBar ToFu - Flight time recorder
FuBar ZepMaster - ZepShipMaster FuBar Plugin
Fury - end game raiding addon to make Warrior combat easier
FreeBagSlots - Free bag slots counter [Img1]
FriendFinder - An addon that helps you find your old friends from other servers!

G
Gatherer - track the closest plants, deposits and treasure locations on you minimap [Img1] [Img2]
Gamepad - Simplifies using abilities when using gamepad
GamonKillTimer - never miss a gamon kill again!
GCGambler - (Gentlemen's Club Gambler) gambling addon [Img1]
GemtRotations - 1-button rotations for various classes + some helper functions
Gearmenu - addon for switching between items and keybinding them [Img1]
GetMouseOver - A lightweight mouseover addon with some target choosing logics
Ghost - Creates 25 buttons bar under mouse pointer (hidden) [Img1]
GMBlacklist - helps GMs to cut and blacklist raw chat messages
Guildbank - AddOn for posting bags and bank items to forum (BBCODE)
GuildMap - Displays guild members on the world and mini map
GuildSearch - Search guild roster by provided name or part of it [Img1]
Gourmet - selects suitable food / drinks for picky eaters
GrayAutoSell - Automatically sells all your gray bag items when you interact with a merchant
GrimoireKeeper - Tracks which grimoires your warlock pets have learned [Img1]
GrimReaper - Shows the last three hits whenever a player dies
GroupCalendar - provides an in-game calendar for planning, signing up, and managing events
GryllsComboSounds - Plays sounds on combo point gain
GryllsGlow - item border colors for the character frame [Img1]
GryllsUnitFrames - Adds HP & Power values to the unit frames [Img1] [Img2]
GetSpellInfo - An addon to help developers access information about spells
GFW FeedOMatic - Helps a Hunter keep his pets well fed (and the food in his inventory under control)

H
HawkenPlates - Nameplate based on Hawken (Mech FPS Game) [Img1]
HBActionBars - Action Bars Replacement
HBPowerInfusion - Helper for Power Infusion Priests
HCSpy - Find out who is using Luna unit Frames or HealComm!
HonorSpy - collects all the honor/rank info on all players you met and shows it [Img1]
HordeIronfoe - Ironfoe speech impediment repairer for Horde
HotBotPanel - Helpful panel for keeping hots up on Sapphiron [Img1]
HealComm - Visual representation of incoming heals [Img1]
HealingAssignments - Make easy and fast Healing Assignments, post them in class-colors! [Fu] [Img1]
HideNamePlates - Hides name plates based on unitnames [Img1] [Img2]
HideUI - Hides the icons at the end of the action bars [Img1]
HunterPaging - changes your action bar based on range
HunterSwissKnife - provides hunters with a set of useful things [Img1] [Img2]

I
IBDF - addon to control what mages cast
IdAddon - does everything I wouldn't want to play without [Img1]
IdQuestAutomation - Skips social dialogue, automates quest accepting/turning in
IdWarlockDeleteShards - Deletes Soul Shards above a set amount (5 by default)
IgnoreMore - allows you to ignore more players than the default UI allows you to
IMBA - several unique functions for coordination raid, develop tactics and its display in visual form for all raid [Img1]
IMDead - Plays an audio file when you die and lvlup
ImprovedIgnore - Improved functionality for ignore
Impulse-booster - mainly improves UI loading speed for pre-WotLK clients and sometimes improves performance
Inspect - debug pretty print
Interruptor - Interrupt announcer
InventorySale - Converts inventory in to BBcode for easy forum posts
ItemHints - Tooltip notes for interesting items
ItemsOfPower - Item Stat Valuation Addon [Img1]
ItemRack - Context menus for inventory items [Fu] [Vid1]
IWIN - A one button macro addon for Warriors

J
JIM CooldownPulse - As spells, actions, and items become available, their icons will flash in a conspicuous place
JIM toolbox - provides configuration UI for other AddOns!
Joana's Guide Atlas Suite - is a leveling guide built into the Atlas addon [Img1]

K
KANGZ - addon for managing Dire Maul Tribute buff run invites [Img1]
KeyringOpener - Opens the keyring whenever all bags are opened (Shift-B)
Killpro - used for tracking all kills [Img1]
KLHHaremMeter - adds an image above your KLHTM Frame that will change depending on your current threat [Vid1]
KLHThreatMeter - monitors and records your threat [Fu] [Vid1]
KTMAutoHider - Automatically hides KLH Threat Meter if you are not in a raid or a party [Img1]
KTMemeAddon - Replaces mob names of the KT encounter with meme-ier names
KTP3ShackleCounter - Keeps track of the number of shackles on the Kel'Thuzad encounter phase 3
KLHThreatMeterBlizz - adds a small threat indicator to your target frame [Img1]
KillLog - a GUI for browsing your Kill Log history [Img1] [Img2]

L
LieExp - Adds a simple experience tracker [Img1]
LilSparkysWorkshop - adds auction-derived pricing information for trade skills right into the trade skill recipe frame [Img1]
LunaUnitFrames - Lightweight Unit Frames in a modern look [Vid1]
LagCast - compensate for latency and the casting design flaw in the Vanilla client
LazyPig - UI Enhancements [Vid1]
Linkmend - Converts CLINK links into regular ones and localizes and fixes regular ones if possible
LazyRes - makes resurrecting the raid after a wipe easy
LazySpell - auto healing spell rank scale for Clique and Classic Mouseover
LazyScript - very powerful scripting tool [wiki]
LHCP - LeeroyHillCatsPower extended audio emotes
LVBM - (La Vendetta Boss Mods) is a stand-alone boss mod for raid groups playing in the end-game content
LoseControl - makes it easy to see the duration of crowd control spells by displaying them in a dedicated icon on screen [Img1]
LootTracker - The primary purpose of this addon is track the loot that you and your party receive [Img1]
LanguageFilter - Filter chat messages by character range

M
MacroTextStop - Hides macro texts in action buttons
MacroTT-V - Create tooltips for your macros [Img1] [Img2]
Mail - Mailbox enhancement [Img1] [Img2]
ManaMinder - addon for managing mana consumables [Img1]
MapOfScars - adds the Skyrim's compass [Vid]
MapTarget - makes all "red dots" on the minimap clickable [Vid1]
MasterLootRemind - Prompt Raid Leader to Set Master Loot when a Boss is detected
MasterLute - Sends raid chat message with some predefined variables by user
MaxCam - automatically enables maximum camera distance
McgUI - Melee user interface (1920x1080) [Img1]
Metamap - adds features to the world map [Img1]
MeleeStats - addon to see your melee stats
MobResist - Show the current armor and resistance of the mob that you are targeting [Img1]
MobsToLevel - adds a small window that tells you how many more mobs you need to level up! [Img1]
MobHealth - displays the current and maximum health of your target on top of the target frame
MobHealth3 - Shows the exact NPC Health [Img1]
MobInfo2 - provides you with useful additional information about opponents/monsters
Mouseover - Enables mouseover actions on unit frames
MikScrollingBattleText - a replacement for Blizzard Floating Combat Text and Damage output [Vid1]
MB-CA-icons - Addon to track when Mongoose Bite & Counterattack is usable
Modguide - puts VanillaGuide into a chat window [Img1]
Modui - Complete vanilla UI (Clean but modern!) [Img1]
Modui-TallHealthBar - Adds taller player and target health bars to modui [Img1]
Modui-FocusFrame - Adds modui style changes to FocusFrame [Img1]
Modtip - Adds target + guild name in the default tooltip [Img1]
MRE - is a simple mod that shows the number of rage / energy / mana [Img1]
Mule - help moving consumables back and forth between characters [Img1]
MinimapButtonFrame - gathers up all of your minimap addon buttons and puts them into a movable frame [Img1]
ModifiedPowerAuras - lets you customize graphics to remind you do do certain things [Img1]
MacroExtender - allows you to create conditional statement macros that are found in TBC+ and more [Read]
MinimapButtonBag - cleans up your Minimap and relocates the buttons in a menu bar [Img1]
MorunoRankEnhanced - addon for estimating PVP-Standings [Img1]
ManyQTItemTooltips - Up to 20 tooltips [Img1] [Img2]

N
_Nameplates - sorts nameplates into friendly and hostile columns [Img1]
nampower - Dramatically increase cast efficiency on the 1.12.1 client!
Nauticus - transportation tracker [Fu]
NBR - (NirkBuffRemover) automatically remove the least useful buff when you get close to the buff cap [Img1]
NotGrid - It's pretty much grid and it works [Img1]
NotesUNeed - Notes Manager that allows you to track Friends, Ignores, Guild members, Quests, Items and generic notes [Img1]
NyaMap - Make your minimap sexy [Img1]
Niagara - makes a list of all your Ace2 Addons that use AceConsole using Waterfall Lib so you have a GUI for config [Img1]

O
OneButtonHunter - A very simple addon, executing the rotation of the hunter
oCB - (Otravi Casting Bar) Quartz Like castbar [Img1] [Img2]
OmniCC - A universal cooldown count, based on Gello's spec [Img1]
OoI - addon to help with Oil of Immolation
oRA2 - a lightweight alternative for CTRaidAssist [Img1]
Outfitter - is an equipment management addon which gives you fast access to multiple outfits [Fu] [Img1]
OutOfMana - check the mana percentage of raid members [Img1]

P
PallyPower - easy to use interface that allows you set your own blessings and automatically check for missing buffs
PerfectShot - Hides UI / name plates and then takes a series of screenshots
PingoMatic - Minimap Ping Improvements [Img1]
Pitty - will attempt to identify people healing using automated healing addons, such as QuickHeal
Pummeler - One button for equipping and using Manual Crowd Pummeler(s)
PoisonCharges - show you remaining charges and remaining time of your poisons [Img1]
PowerAuras - This Mod was created to have a better visibility when you gain buffs, debuffs and many more [Vid1]
pfDebug - A little tool to monitor the memory usage, peaks and garbage collection [Img1]
pfDesktop - An In Game-Desktop Environment [Img1]
pfQuest - A lightweight quest helper and ingame database [Img1]
pfUI - full replacement for the original Wow interface in a single Addon [Vid1] [Discord] [Read]
pfUI-addonskinner - External module for pfUI that provides you with pfUI-themed skins for other addons [Img1]
pfUI-autoinvite - External module for pfUI that allows you to set auto invites through whispers [Img1]
pfUI-CustomMedia - External module for pfUI providing additional textures for the unit frames and casting bars [Img1]
pfUI-debuffmonitor - External module for pfUI that shows mob armor, resistances and important raid debuffs [Img1]
pfUI-font-dyslexic - A font package for pfUI, providing additional font options from OpenDyslexic [Img1]
pfUI-lootfilter - External module for pfUI that allows you to filter items from your inventory [Img1]
pfUI-managems - External module for pfUI that allows you to keep track of your mana gems status [Img1]
pfUI-tradeskillcd - External module for pfUI that allows you to keep track of tradeskill cooldowns [Img1]
pfSimpleDamage - A lightweight Damage Meter [Img1]
pfStudio - an in game-IDE [Vid1]
Punschrulle - Highly customizable castbar [Img1]
PlayerStates - Macro Helper addon
Profession query - useful addon for crafters selling their services!
Possessions - Inventory List Addon with Alt support
PowerInfusionHandler - Shows a bar with how how long PI is active as well as how long the cooldown is [Img1]
PicoPoisons - displays remaining poison charges on the respective buff symbols [Img1]
Prat Vanilla - Chat customization addon [Fu] [Img1] [Img2]
PriestBinds - Provides keybinds for priest abilities
Pvpwarn - Addon that warns players visually and acoustically about pvp events [Img1]
pwscounter - allows to track how many Power Word: Shields are being cast in a raid fight

Q
Questie - A standalone Vanilla QuestHelper [Vid1] [Discord]
QuestSoundBits - is a quest progress sound alert addon
QuestTranslator - Italian Quests Translator [Img1]
QuickBind - Mouseover keybinds for action bars
QuickChat - allows you to assign Hotkeys to all your channels [Img1]
QuickHeal - Quick healing of party/raid members
Quickmark - assist with quickly marking targets [Img1]
QuestHaste - allows fast turn in of quests
QuestItem - stores an in-game database over quest items and tell you which quest they belong to

R
RABuff - Monitors a raid / party group, displaying various statistics [Img1]
RageTracker - Shows an resizable and movable rage bar
RaidOrganizer - User-friendly interface for raid role assignment
RaidRollHelper - Fair item distribution with /roll in raids
RangeColor - Change the icon color when out of range, no mana or not usable [Img1]
Rank14losSA - verbally tells you when somebody is using a Cooldown, or an important ability [Img1]
RapidQuest - WHDB modified to work with a MetaMap [Vid1]
RAT - (Raid Ability Tracker) tracks certain class ability cooldowns (in raid) and puts them in an easy to view list [Img1] [Img2]
RDX (Raid Data Exchange) a tool for acquiring, filtering, and visualizing information about your raid team [Img1]
ResurrectionAnnounce - Plugin That Adds Resurrection Announce to Chat
Retarget - Retargets Hunters after Feign Death and Rogues after Stealth
RezzTimer - Shows resurrection timers of other party members who have this addon [Img1]
RogueRota - A very simple addon, executing the rotation of the rogue
Roid-Macros - allows you to use a small subset of the macro conditionals [Vid1] [Vid2]
RosterFilter - a guild frame based on aux [Img1]
RecipeRadar - assists players in finding recipes [Vid1]
RingMenu - a circular ActionBar that can be summoned with a click [Vid1]
ReckCounter - a small frame showing stored strikes from the Paladin Reckoning talent
ReagentCounter - Displays reagent count on the spell's action button
ResourceCountActionButtons - Displays how often you can cast a spell before you run out of resources on the action buttons
RaidSummon - small RaidSummon frame [Img1]
RogueFocus - Compact Combo/Energy/Tick display [Img1]
RoguePack - First necessary add-ons to the Rogue
ruRU ClassicAddons - Addons supporting ruRU local
RealLag - Attempts to give the Classic WoW client a more realistic lag display
RenewSpam - autocasts renew(rank 1) on any raid member that doesn't have renew
RWSync - Multi Raid Warning

S
SafeBuff - Smart target buffing
SafeShift - Safety measure against accidentally unshifting immediately after shapeshifting
Salad Cthun - Shows optimal positioning based on group on C'thun [Img1]
SaySapped - Says "Sapped!" to alert those around you whenever a rogue saps you
SaySapped Extended - Also works for many other CCs
SeeThunGroups - C`thun group setup helper for raid leaders [Img1]
Select AddOns - addons authored by Road-block (some not) [Img1]
SellValue - Adds vendor prices to tooltips [Img1]
Sentry - Open pvp enemy frames/alerts [Img1]
Server Translation - Addon for the translation of the server part of the game
Shootyepgp - Guild Helper addon for EPGP loot system
SimpleActionSets - Save action bars as sets that can be swapped out [Img1]
SimpleRaidTargetIcons - Target Marking and Mark Targeting Improvements [Img1] [Img2]
SKMap - tracks player deaths, player pvp kills, their location by zone, and displays them on the world map
Sota - State of the Art DKP and Loot addon
SpamSentry - Documents Gold Spammers by making an automatic screenshot of the message
SpamThrottle - addon to remove unwanted chat messages [Img1]
SpellAlert - Warns the player of the spell being casting from the hostile units [Vid1]
sQMinimapFix - A quick fix to force a constant minimap zoom level across all zones, cities and instances
sRaidFramesImproved - was originally designed to replace the raid frames provided by CT_RaidAssist [Img1] [Img2]
StatCompare - StatCompare, adds a panel next to the Character Panel [Img1]
StealthOverlay - slowly dims your screen when you enter Stealth [Img1]
StopDuelBuffer - Auto-Decline World Buff / Flask Chugger Duels
StopWatch - a simple stopwatch that uses blizzards style [Img1]
SpellPowerMulti - displays the current relevant damage multipliers on a target as well as the current total multiplier [Img1]
SmallerRollFrames - replaces the default Roll-Frames with smaller ones [Img1]
SmartDebuffCheck - Simple addon to check if your target has the proper debuffs applied [Img1]
SmartHealer - Autoscales heals in macros, and click heals for pfUI, Clique and ClassicMouseover
SmartLoot - is a unobtrusive group loot frames AddOn [Img1]
SmartRoll - addon to help with rolling on items for multi-raid groups [Img1]
SnagaLoatheb - Makes rotating Heals on Loatheb a lot easier
Snipe - automatically buys any auction that matches a target in a specified target list
Sniper - Mob Sniping Helper
SoulShardManager - Keeps your Soul Shards in check
ShaguBam - a BamMod alike Addon [Img1]
ShaguBoP - auto accepts BoP loot when alone [Img1]
ShaguChat - highlight and hide custom chat messages [Img1]
ShaguClock - draws a simple movable clock on the screen [Img1]
ShaguColor - allows to write colorful chat messages [Img1]
ShaguCombat - displays your combat state via glowing screen edges [Img1]
ShaguCopy - allows to copy chat messages [Img1]
ShaguDelgado - modifies some elements to be purple [Img1]
ShaguError - hides error and notification message popups [Img1]
ShaguInventory - shows account wide item count inside the tooltips [Img1]
ShaguKill - displays the remaining kills till level up [Img1]
ShaguMount - automatically unmounts the player when using an action [Img1]
ShaguNotify - shows achievement alike notifications for several events [Vid1]
ShaguPlates - modifies and extends the default nameplates [Img1] TidyPlates-Edit
ShaguScore - displays a gearscore alike item rating [Img1]
ShaguStance - automatically switches to the required stance [Img1]
ShaguTooltips - modifies the game tooltips [Img1]
ShaguValue - display item sell and buy values on tooltips [Img1]
ShamanFix - changes the shaman class colour to blue
Strategos Battleground - custom minimap for battlegrounds
StrategosCore - Enhances your BG experience [Img1] [Discord]
Strategos Minimap - custom minimap for battlegrounds
SimpleCombatLog - Pretty Print Combat Log AddOn
SUCCbag - addon to unify user inventory and bags [Img1]
SUCC-ecb - enemy castbar
SUCC-ui - UI replacement
SunOfTheNight - addOn that tries to "backport" the Character Menu of Skyrim [Img1]
SuperMacro - provides a very much improved interface for macros [Vid1]
SuperIgnore - Unlimited ignore list with many extra features [Img1]
SVT - Keeps track of Shadow Vulnerability
SpartanUI - designed to free your screen by moving a majority of the interface elements to the bottom [Img1]
SpartanUI_SpinCam - Causes the camera to spin around your character when you go AFK
SilverDragon - tracks rares [Img1]
Samuel - Static swing timer with 1 - 1.5 second Slam marker for warriors [Img1]
SP_SwingTimer - Warrior Swing Timer [Img1]
SP_Overpower - Shows an alert tooltip and timer bar on your screen when Overpower procs
Swapper - is a container swapping utility addon
SwapRaidSubgroupByName - Adds a function to swap raid members by name rather than by raid-index
SW Stats - (named after guild Shadow Warrior) is a damage/heal (and more) meter addon [Img1]
SyncedUI - A complete UI solution featuring a customized profile & release of pfUI for for 1920x1080 [Img1]
SummonsMonitor - makes it easy for one or more Warlocks to summon multiple people [Img1]

T
TankAssignments - helps you assign tanks to raid targets
TankBuddyEnh - Alert raid on successful/missed taunt/kick/cc
TankHeal - Tank Heal Assistant
TargetAssist - Simple raid target icons [Img1]
TargetFrameBuff - View all 16 buffs/debuffs on default UI
!Toggle - Disables toggling behavior of Attack, Auto Shot and Shoot
Thaliz - Smart addon to handle ressing party / raid members [Img1]
Threat - Provide a single button to generate the maximum available threat on a given single target
TinyTip - changes the look of your GameTooltip
TimeManager - Time Management features [Img1]
Timers - Flexibly customizable timers for tracking by triggers [Img1]
TimeTracker - addon to create custom bars
TitanCritLine - Saves your high normal and critical damage records and flashes a message if your break the record
TitanGuild - TitanGuild with EPGP display
TitanWowRadio - Titan Plug-in for WowRadio
TomTomVanilla - a mix of the Legion TomTom and QuestieArrow [Img1]
TotemTimersEnhanced - keep track of shaman totems, how long they'll last and when their next Tick comes [Img1]
TradeDispenser - allows to automatically trade any water or food you have in your bags [Img1]
TrinketMenu - a mod to make swapping trinkets easier [Img1]
Talentsaver - save & load your common Talent Specs with just one click! [Vid1]
TriviaBot - allows the user to host quiz games for other players
TopMeOff - will automatically top you off on reagents when you talk to a reagent vendor
TourGuide Professions - Professions guides for 1-300
TourGuideVanilla - Power Leveling guide framework [Img1]
ToxicTagger - enables you to easily make macros that are good for tagging mobs

U
UberBanish - Informs the party/raid of how much time is left in your Banishes
UITweaks - Tweaks the User Interface to be as minimalistic as possible
UnicodeFont - Enables you to see Chinese, Japanese and other languages in game
UnitFramesImproved - improve upon the standard blizzard unit frames without going beyond the boundaries set by them [Img1]
Unitscan - automatically scans for characters by name and alerts you upon finding one [Img1]

V
Vanilla Addons - vanilla addons fixed by Laytya
Vanilla addons A-Z - Big addons repository (Last updated: 30 Apr 2018)
VanillaGraphicBoost - Push the game's visuals to the max [Img1]
VanillaGuide - An in-game leveling guide [Vid1]
VanillaRatingBuster - Displays ratings for items in tooltips based on stat weights [Img1] [Img2]
VCB - a highly customizable buff frame [Img1]
VendorAutoBuy - Auto buy limited items from merchants [Img1]
VF WarriorAddon - Announces Last Stand / Shield Wall / Missed Taunts
VGAntiCooldown - Tracks and purge enemy buffs
VGAttackBar - Displays a progress bar for your attack speed [Img1]
VGInterrupt - interrupt your target
VGShamanTools - tracks weapon enchantment and totem timers [Img1]
VGSmartUnbuff - removes the lowest-priority buff
VoidBattle - AddOn that removes battleground spam messages from chat
VQueue - Group finder utility [Vid1]
VanillaStoryline - enhance the readability and immersion when questing [Img1] [Img2]
VanillaMaps - collection of detailed and clear maps, gathered from various sources

W
WarriorHUD - a HUD(Head-up-Display) created exclusively for Warriors [Img1]
WarriorTank - One button warrior tanking
WebDKP Elysium - addon to help guild leaders manage their dkp
WFW - addon for switching weapons when you have Windfury totem
Whisper Filter - If you are annoyed by whispers of gold sellers and beggars this is right choice for you [Img1]
WIM - (WoW Instant Messenger) brings an instant messenger feel to communication in game [Vid1]
WhoHas - Tooltip Addon showing item counts and other info
WhoFavorites - Store and Replay /who queries
WhoKicksNow - Displays cooldowns for Kick, Gouge, Cheap Shot and Kidney Shot to everyone in group who use the AddOn
WhoList_Fix - Fix the Who-List Display [Img1]
Warmup - Measures addon loading times
WorkAroundSelfCast - AddOn to enable the use of autoSelfCast with other AddOns like PallyPower
WorldBossAlert - simplifies scouting for world bosses by checking the scout's combat log for crucial events
WorldFilter - filters the world and trade channel by keywords
WowLua - Lua scripting environment that includes an interactive Lua interpreter as well as a multi-page script editor [Img1]
WowRadio - Listen to Internet Radio inside WoW [Img1]
WoW-UIs - A simple collection of legacy UIs
WRUGS - Effective addon to block gold seller whispers

X
XckMasterLootAdvanced - Easy way to assign loot as ML [Img1]
XFactionChat - Cross Faction Chat
XLoot AddOns - A remake of the built-in loot frame [Img1]
XPerl - Replaces the normal unit, party, target, pet frames and adds target-of-target
XTranqManager - Easy Auto Announce TranqShot [Img1]
XtraUnitFrame - Advanced Compact Unit Raid Frame [Img1] [Img2]

Y
YAHT - Yet another Hunter Timer [Img1] [Img2]

Z
ZeroDB - database addon [Img1]
ZGLoot - automate looting in ZG, AQ 20 and AQ 40 [Img1]
ZGTracker - Tracks Zul'Gurub coins and bijous lootage
zUI - A UI that aims to preserve the blizzard look/design but with a modern touch and with some nice features added [Img1] [Img2]