Recommended Add On's

Raid leaders

• http://www.deadlybossmods.com/ or Big Wigs
• Omen Threat Meter (Required)
• X-perl Unit Frames 
• Lucky Charms - Fubar users
• Logger Head - set it to automatically record combat logs when you enter the instances you wish to record. for the purpose of later uploading to WWS
• GEM (Required)

Raid Healers

• http://www.deadlybossmods.com/ or Big Wigs
• Omen Threat Meter (Required)
• X-perl Unit Frames 
• Decursive
• Heal bot
• GEM (Required)

Raids DPS/tanks

• http://www.deadlybossmods.com/ or Big Wigs
• Omen Threat Meter (Required)
• X-perl Unit Frames
• GEM (Required)

General

• Designated Driver (ALL SMOKERS INSTALL) - allows other players in game to put you on follow if you are afk
• Altoholic - tracks banks bags crafts XP across charactor/server with access from any charactor on account. view your banks/guild banks from any toon anywhere
• Outfitter - tracks gear sets and shortcuts for quick swap
• Guild Craft - shares crafting information in guild
• Little Wigs - 5 man instance and heroic Boss notices
• Quest Helper - recommended by guildies I havent tried it
• Guild Alliance - Guild Alliance is a mod for combining multiple guilds with ease. Another guild page is added to the 'friends frame' like CTRA. It lists guild members from the other guild and other functions such as inspections, alliance chat, alliance officer chat and guild leader controls.

 Maps

• Atlas - instance maps
• Atlas Loot Enhanced - boss and faction items
• Gatherer - tracks resource nods for mining herb fishing and more
• Cartographer 3.0  This is a map addon for World of Warcraft that replaces the map and offers shiny features. The idea is for it to work very much like Google Maps, only in-game. Cartographer 3.0 is brand new, "experimental" version of Cartographer.
• Cartographer Cartographer is a modular, lightweight, and efficient framework for manipulation of the world map. It is based on Rock and other libraries of the wowace community.

PvP

• Paranoia

User Interface Customisation

• Titan Panel Titan panel provides bars top and bottom of your UI which you can fill with complimentary addons to make information and more more readily accessible.
• Fubar Fubar provides bars top and bottom of your UI which you can fill with complimentary addons to make information and more more readily accessible. I highly recommend Fubar over Titan Panel as Fubar has MANY more modules available and compatible with a much wider range of mods.

Dailies Quest Helpers

• IHML - I Have Macro Lol!
• Ogri'Lazy a helper which remembers the order of the crystals in ogrila to assist with the ogrila dailies
• Bombers Buddy - BETA (only available using Ace Updater)
• Dailies Quest Tracker

Spell Timers and Trackers

• Dotimer - no longer updated
• Spell reminder
• Class Timer
• ZOMGBuffs - buff monitor and tracker automatically reapplies buffs at set intervals or when absent. compatible with pallypower for paladins and performs the same function. perfect for all classes buffing needs. HIGHLY RECOMMENDED FOR LAZY BUFFERS. also auto restocks reagents when you open reagent vendor window.

Warlocks

• Necrosis

Mage

• Cryolysis 2

Shamans

• TotemTimers

Hunters

• ZhunterMod
• Feed-o-matic
• Hunters helper
• SEasyRotations

Website Integration

• CT-Raid Tracker
• Guild Launch Profiler
• Guild Launch Rapid Raid

Addon management

• Curse Client - small program which lists all addon's installed and not installed. it is used to update your addon's install addon's and uninstall addon's very quick and easy to use.

EVERYONE install ventrilo even if just to listen and hear your leaders.