Ackis Recipe List - wow.curse.com

          Scans your trade skills and provide information on how to obtain recipes.

AlphaMap - wow.curse.com

          Includes Maps for Instances, Battlegrounds, & World Bosses, and the major non-Instance Cave systems.

Armory - wow.curse.com

          Armory will show you nearly everything about all your characters without having to log out.

Atlasloot Enhanced - wow.curse.com

          Browse loot tables of bosses while in game. access item tooltips, drop rates, & more.

Auctioneer - auctioneeraddon.com

          Does anyone not know about Auctioneer?

ChatBar - wow.wowinterface.com

          A small simple bar of tiny buttons for easy access to all the chat channels.

CritLine - wow.curse.com

          CritLine tracks your critical strikes for each of your attack types, and your pet's attacks if you have one.

EasyMail - wow.curse.com

          Adds a couple of buttons to make sending/recieving mail easier, and more.

EquipCompare - wow.curse.com

          Displays comparison tooltip showing the "currently equipped" item and any comparable item you mouse over.

FriendsFacts NSC - wow.curse.com

          Puts additional info about your friends on your friends list.

Gatherer - gathereraddon.com (Has not been updated since 2009-08-06.)

          Tracks items you gather and records their locations so that you can track item locations.

GearScore - wow.curse.com

          Quickly and easily judge a player's level of Gear, In-Game Armory.

GearScoreLite - wow.curse.com (This is the version I use.)

          A trimmed down version of GearScore, no Armory, no frills.

HealBot - wow.curse.com

          Apply/Monitor buffs, heals, cures, track aggro, a SmartCast option, many healing options.

InFlight Taxi Timer - wow.curse.com

          A countdown timer to your destination, or measures elapsed time to destination.

NotesUNeed - wow.curse.com

          Make custom notes on players, and quests, and items, etc.

Omen Threat Meter - wow.curse.com

          Shows your group's relative threat level on individual enemies to see who is pulling the most aggro.

Outfitter - Equip Inventory/Items - wow.curse.com

          Outfitter can swap out your armor & weapons with a click or even automatically.

QuestHelper - wow.curse.com - (An excellent addon, but I use Blizzard's built-in Quest Tracker now.)

          Helps you to finish your quests in the easiest, fastest manner.

QuestGuru - wow.curse.com - (An excellent addon, but I quit using it.)

          Quest Log, Quest History, showing all quests that have been completed since installing QuestGuru and more.

RankWatch - wow.curse.com

          RankWatch will watch for downranked spells cast by you and other members of your party or raid. Great for those with dual specs.

RatingBuster - wow.curse.com

          Detailed, meaningful, and customizable information about items to easily decide which item is better.

SpeedyGonzales - www.wowinterface.com

          SpeedyGonzales shows your speed and if flying, shows your pitch angle. Not necessary, but I like it.

Titan Panel - and - Titan Panel AddOns - wow.curse.com

          Adds a control panel bar on the top and/or bottom of the screen and allows a framework for extensive plugin support.

UnderAchiever - wowinterface.com

          The AddOn that makes achievement links fake themselves!

ZHunterMod - wow.curse.com

          For Hunters only, a nice auto-hiding bar to switch between aspects. Note: Is out of date but still works.

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O t h e r   U n s u p p o r t e d   A d d - O n s.

The following addons are no longer supported and seem to be unavailable. After a little tweaking these still work fine and I have made them available here. I am not the author of any of these, I only edited the Interface code to make them work without checking the "Load out of date AddOns" box. Currently working with game version 3.3.0.

FreeBagSlots
        Does only one thing, shows you the number of free slots in each individual bag.
       

MyCalc
        Brings up a simple, movable, calculator.