An addon which will scan your trade skill recipes and print out a list of which recipes you are currently missing.

ATSW is a complete replacement for Blizzards tradeskill window with more overview and special functions.

Altoholic is an Ace 3 addon written for people who dedicate most of their time to leveling alts, and who want to have as much information as possible in one addon. The main feature of the addon is the search functionality which allows users to search their alts' bags or loot tables in an Auction-House-like frame

ArkInventory (AI or ARKINV) is an inventory mod that was based off EngInventory when the BtS 2.0.0 patch came out and I needed a working replacement. AI's display windows are built from "virtual bars", you assign categories to bars so that items in that category are displayed on the specific bars you want.

Atlas provides a map for every instance in the game. Furthermore, the maps are marked with the locations of bosses and other points of interest. Atlas also includes maps of battlegrounds, dungeon locations, flight points, and outdoor raid bosses.

AtlasLoot Enhanced is an UI mod allowing for loot tables of bosses to be browsed whenever needed within the game. It can access full item tooltips, show drop rates, allow items to be chat linked and to use the dressing room. Features include: * Configuration Menu; * Drop Rates; * Enhanced Tooltips; * Chat Links; * Dressing Room; * EquipCompare; * Use with fixed price DKP systems; * Portability

AtlasQuest is an addon for Atlas or AlphaMap that displays a list of quests for each dungeon along with information and rewards for those quests. Currently all dungeons and battlegrounds are supported along with the majority of their quests.

Auctioneer is an addon that allows you to view information about an item that may be useful in helping you determine what it's worth. Straight out of the box, Auctioneer knows much about many items in the game, and will tell you many things about the item when you move your mouse over the item in the game.

BadBoy is a nice and simple gold/hack/phishing/casino blocker & reporter.

Bagnon is a group of addons that improve the way the player manages his or her inventory. * A single, customizable display for your inventory and one for your bank * Color coded item slots and borders * View bank from anywhere (requires Bagnon Forever)

Simple and Advanced combined, Bartender4 is an Ace3 AddOn to provide more flexibility and functionality to the Action Bars.

A boss alert mod. It consists of many individual "boss modules", mini addons that are designed to trigger alert messages and timer bars for one specific raid boss each. Modules are activated when you target or mouseover a Boss, or if any other BigWigs use in your raid does. In most cases only one module will be running at any given time.

CARBONITE® is a full quest database, enhanced quest watch list, HUD Arrow and cool movable, scrolling, zooming Google like world map that makes questing easy.

Cellular is an instant messenger mod (for only whispers) based on the functionality of an old version of ForgottenChat.

Clique is a simple addon that enables powerful click-casting and hover-casting on your unit frames and in the 3D game world. You can bind virtually any mouse or keyboard combination to a spell or macro.

Combuctor is a bag replacement addon designed to help the player find things in his or her's inventory as quickly and as easily as possible.

LibDataBroker is a small WoW addon library designed to provide a MVC interface for use in various addons. LDB’s primary goal is to “detach” plugins for TitanPanel and FuBar from the display addon. Plugins can provide data into a simple table, and display addons can receive callbacks to refresh their display of this data.

* Boss mods for all raid bosses; * Colored raid warnings!; * No dependencies, no embedded libraries, 100% stand-alone; * Modular design - all boss mods are plugins and can be exchanged, removed or updated separately; * Load on demand - boss mods and the GUI are separate AddOns and they will be loaded when they are needed; and much more

This is a cleaning mod. Its job is to help a class that can remove afflictions to do it with ease in every conditions (playing solo, in small groups or in big raids).

Dominos is an action bar addon intended to do the following: * Reuse as much standard blizzard action button code as possible; * Contain a relatively minimal feature set; * Be easy to use; and * Be stable

DoTimer is an addon that times DoTs and HoTs that you cast on other people.

When you shop for items at a vendor or the Auction House and you hover over an item, you get a comparison tooltip showing the "currently equipped" item too. This AddOn adds such a feature everywhere in the game where you can hover over items, such as in your bags, in the loot window or on the reward page of a quest. You also receive comparison tooltips when clicking an item link in the chat box.

*'Fish Watcher' lets you see the fish you've caught here before (or the fish that you've caught in the current session); * Display your current skill level and the time since you started fishing; *Choose your fishing outfit and change into it easily; * Support for automatically adding a lure to your fishing pole; * Full Titan Panel support; * myAddOns support; * Preliminary support for tracking 'cycle fish' such as the Nightfin Snapper so you know when to go looking for them

ForteXorcist is a powerful AddOn for Raiders. Mainly targeted at Warlocks. Main features: Spell Timer, Cooldown Timer, Self & Raid messages, Warning Sounds and more

A panel that other modules can plug in to, giving easy access to a variety of info and functions in a handy line at the top and/or bottom of your screen.
» Alternatives: FuBar has been discontinued. See DataBroker displays and plugins

Gatherer is an addon for herbalists, miners and treasure hunters in World of Warcraft. It's main purpose is to track the closest plants, deposits and treasure locations on your minimap.
» Alternatives: The Gatherer team have told me that it is still functional, just use the 'load out of date' checkbox.

Grid is a modular, lightweight and screen-estate saving grid of party/raid unit frames written by Pastamancer and Maia. Optional modules can be assigned to up to 7 possible indicators: each corner, a border center text and center icon - to highlight specific units (and if you prefer to only show units in range, this is posible too). Grid comes with a bunch of modules (aggro indicator, incoming heals, auras (debuff types, shield, renew, rejuv, mortal strike,...), mana, health deficit,...), but it's easy to add your own modules (see the developer API).

Group Calendar allows guilds or groups of friends to share an in-game event calendar. The guild can post raid events and members can post events for dungeons they need to do quests for. Additionally, players can provide feedback to the event's sponsor saying that they will or won't be attending an event.

HealBot allows for 20 key mouse combinations to cast any beneficial spells. HealBot allows for 20 key mouse combinations to cast on disabled bars. HealBot can track and display who has aggro. Any usable item can be added to all combos. Any existing macro can be added to all combos. Target, Focus and Assist can be added to all combos. And much more.

A Heads Up Display featuring Player and target health and mana bars, casting and mirror bars, pet health and mana bars, druid mana bar in forms, extensive target info, ToT display, and much more

This is a mod to make swapping equipment easier. You add equipment slots to a bar and mouseover on the bar will create a menu of all items in your bags that can go in that slot.
» Alternatives: There is a fan update ItemRack - Cataclysm.

LightHeaded is a very simple addon that displays quest information and comments from Wowhead in game, eliminating the need to Alt-Tab when you get stuck on quest.

A macro-based action bar addon. It can stand on its own or supplement any other action bar addon or even the default Blizzard UI.

Mapster is a very simple world map enhacement addon, which was designed to work in conjunction with all other map addons out there. The idea to create Mapster originated from pure lack of a simplistic addon that only modifies the world map, without adding a full scale feature set.

Masque was formerly known as ButtonFacade. It is a small add-on that allows for the dynamic skinning of button-based add-ons.

MetaMap adds features to the WoW world map, keeping all mapping type features in a single place. Some features are: Adjust the map window size. Move the map anywhere on the screen. Adjust the opacity of the window & maps. Saved sets for toggling between 2 map modes. Allows full player movement, messaging, etc. with map open. Adds coords to the main map and the Minimap. Adds Instance maps which open to the correct instance you enter. Default data included for all bosses & locations etc. User editable notes for all maps, including instance maps. And more.

MSBT is designed to be an extremely lightweight, efficient, and highly configurable mod that makes it easier to see combat information by scrolling the information on the screen in separate, dynamically creatable scroll areas. It is a replacement for Blizzard's Floating Combat Text and Damage output.

nUI is a user interface replacement for World of Warcraft. It is 100% standalone code designed to feel like Bliz meant the UI to look this way. nUI removes a ton of clutter from the display, provides detailed targeting information, an integrated HUD, cooldowns and more all in one tightly integrated single-source addon that requires no user configuration.

Omen is a threat meter. Basically, enemies in WoW decide who to attack by deciding who is the most threatening based on the abilities you use. What Omen attempts to do is provide reasonably accurate estimates of your group's relative threat level on individual enemies, so that you can see when you're in danger of pulling aggro (or, if you're next on the snack list if your tank bites it). This info is usually only critical in raids, where only tanks can survive aggro, but it's useful for any multi-player situation.

OmniCC is an addon that adds text to items/spells/abilities that are on cooldown to indicate when they'll be ready for use. OmniCC should be compatible with any addon that uses a cooldown model.

OneBag is a replacement for the default game bags that combines all the bags into one frame. OneBag doesn't entirely rewrite the bag-handling interface like others do. It simply rearranges the bags into one and allows the default UI to continue managing the bag slots. This means that addons such as KC_Items, ItemSync, LootLink, and SellValue should be inherently supported. As long as an addon is compatible with the default game bags, it should work with OneBag.

oRA reports hp, mana, buffs, and debuffs of anyone or everyone in your raid. You can set it to notify when someone is debuffed with specified types as well as notify when buffs you can recast fade.

oUF is a unit frame framework. It attempts to simplify the process of writing unit frames for WoW by doing all the trivial and painfully boring parts for you. So you can focus more on experimenting with the look of the frames.

Outfitter allows you to create multiple outfits and equip them with a click of your mouse. You can layer outfits, create outfits optimized for a particular attribute (ie, fire resist or maximum defense), and have outfits which automatically equip based on events like mounting up, stealthing or changing stances and forms.

Pally Power is an add-on that provides an interactive and easy to use interface that allows you to control assignments of blessings for yourself and, if you are a party leader or an assistant, for other paladins in your group or raid. You don’t need to be a paladin to control raid/party blessings.

PerfectRaid is a whole new look on raid frames, giving you as much information as possible in an easily recognizable format that's easy to place. Show as much or as little as you're interested in, and completely customize using the each options editor.

Perl Classic Unit Frames replace the default Player, Pet, Target, Target of Target, Party, and Party Pet frames and add dedicated frames for many other units (Focus, Focus Target, Party Target, Target of Target of Target).

PitBull is a Unit Frames addon that provides maximal customization and undergoes rigorous efficiency testing. It is created in a modular framework, which allows for mulitple authors to put their skills to work creating this great project.

Prat is a chat addon framework, and collection. It consists of 30+ modules which each add some functionality to the WoW chat interface. There is literally a module for just about everything chat related.

Simple enemy unit frames for Arena matches used for identifying and coordinating targets.

Quartz is a modular approach to a casting bar addon.

This Addons shows your quest objective on the map! Compiles a list of waypoints for the quests in your quest log, and sorts them so as to minimize the distance between them, and so that they happen in the correct order. Which is to say, it tells you how to complete all your quests while walking as little as possible.

RatingBuster started out as an addon that converts combat ratings in your tooltips into percentages, so that you have more meaningful information when comparing different items. The design aim of RatingBuster is to provide detailed, meaningful and customizable information about items so you can easily decide for yourself which item is better.

This AddOn will track and summarise the damage and healing dealt and received by every participant in fights around the user; as well as most other combat-related events. Recap tracks buffs, debuffs, and the use of abilities.

RecipeBook is a mod that allows you to browse tradeskill recipes with one alt and see whether your other alts know it.
» Alternatives: Fan Update

Recount is a damage meter that is designed with being a raid analysis tool and get better information on you can improve player’s performance. This is achieved via using graphs to better convey information than normal to show time based data or pie charts to get a better sense of proportions.

A fairly simple but very configurable mod that adds damage, heals, and events (dodge, parry, windfury, etc...) as scrolling text above you character model, much like what already happens above your target. This makes it so you do not have to watch (or use) your regular combat chat window and gives it a "Final Fantasy" feel.

SUF focuses on a simplistic configuration while maintaining the flexibility that most users will care about. Supports the following unit frames: Player: Player, Pet, Pet Target General: Target, Target of Target, Target of Target of Target, Focus, Focus Target Party: Party, Party Pets, Party Targets Raid: Raid, Raid Pet, Main Tank, Main Tank Target, Main Assist, Main Assist Target, Boss, Boss Target Arena: Arena, Arena Target, Arena Pets

Skada is a modular damage meter with various viewing modes.

SmartBuff is a buff addon, to cast buffs ease and quickly. All classes are supported. Bind a key, scrollwheel or use the action button and it checks if you, a party/raid member, also hunter and warlock pets, needs your buff and cast it. Use the options menu to configure it you like, as example: buffs, raid subgroups, pets, etc.

SpartanUI is designed to free your screen by moving a majority of the interface elements to the bottom. It is the new look for World of Warcraft. Created by Ansu of Dalaran (aka Atriace) and maintained by Beladona. This is an original design developed through painstaking effort and the help of users and fans at spartanui.com
» Alternatives: SpartanUI (Fan Update)

Squeenix is a square minimap addon, with a few extras.
» Alternatives: Works fine in 4.2, just mark the "load out of date" checkbox.

Talented is a replacement to the default Talent UI, with a lot of added features.

TipTop seeks to modify the default tip instead of replace it. Features: optional class-colored border for units (optional support for !ClassColors), optional difficulty-colored border for units, option to display class icon before unit's name in tooltip (off by default), added target text line, "faded" tip if unit is tapped, dead, or offline, custom border, background, and status bar textures, custom font selection, plus option of Outline, etc., custom background color/alpha, custom health bar color and more

Titan Panel adds a control panel bar on the top and/or bottom of the screen and allows a framework for extensive plugin support. Download category with all plug-ins, here.

TomTom is your personal navigation assistant in World of Warcraft, offering the following major features:Set waypoints via command, or by clicking on the world map, A draggable coordinate display with customizable accuracy, player and cursor coordinates on the World Map (these can be hidden), A floating "crazy-taxi" style arrow that points you to your destination.

This addon displays four timer buttons one for each totem element. If you cast a totem it's icon will be set to the appropriate timer button with the totem's remaining time underneath it.

TourGuide is an interactive leveling guide addon. It is designed to provide the user with a streamlined order of quest completion with smart detection. It is also designed for easy creation of "guides" for users with little-to-no programming knowledge.
» Alternatives: Works fine in 4.2, just use the 'load out of date' checkbox.

This is a mod to make swapping trinkets easier. It will display your two equipped trinkets in a bar. Mouseover on either trinket will display a menu of up to 30 trinkets in your bags to swap.
» Alternatives: Select

VuhDo is a raid monitor similar to CTRaidAssist or Blizzard's built-in raid frames. Basically this is about displaying the health of raid members in form of clearly arranged bars. VuhDo is primarily directed to healing classes, but will make use to almost any other class. Moreover several healing spells or other actions can be asserted to mouse clicks on those bars (Click-Heal).

WIM (WoW Instant Messenger) is a World of Warcraft addon which helps you to manage your whispers by making them into a classic instant messenger interface such as AIM, Yahoo and MSN.

A complete replacement for Blizzard's default unit frames, including raid frames and raid tools, with many additions and improvements.

A replacement for the default loot frame.