Useful Raid Addons

In short, CT_RaidAssist 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. Added 5 "MT Target" options which allow you to specify up to 5 MainTanks which users can then select which 1-5 they want to show.You can sort the groups by group, class, or custom sort, and show as many or as few groups as you like. Each group is movable and colors are customizable so you can customize it to your liking. Another addition is the ability to use /rs alerts, which send an on screen alert to everyone using the mod.

Displays a replication of your targets spell casting bar on your UI, which can be moved around.

Afflictions/ (Spell)Debuffs implemented!

Class specific Diminishing Return timers which are only displayed for the class that can use this spell. The DeBuff duration IS recalculated by this timer!

Detects almost every Stun and triggers a global stun diminishing return timer

TONS of PvE-useful boss abilities cooldowns and cast bars!

Many more

SmartDebuff is an addon to support you in cast debuff spells.

Features:
- Supports all classes
- Supports EN/DE/FR clients
- Checks debuffs on you, raid/party members, raid/party pets
- Shows HP, Mana, AFK, offline, feign death state
- Shows class colors

- Sorted by groups or classes
- Choose your favorite debuff hightlight colors
- Choose opacity
- Sound reminder
- Target mode (like raid unit frames)

Normal mode:
Left click: Debuff 1
Right click: Debuff 2
Shift-Left click: Target unit
Alt-Left click: HoT 1

Target mode:
Left click: Target unit
Right click: HoT 1
Alt-Left click: Debuff 1
Alt-Right click: Debuff 2

This is a complete rewritten Decursive with Ace2. Now it works like new Detox + SmartDebuff, i.e. can show live debuffed list and very tiny MicroUnitFrames (MUF) wich are highlighted when someone is debuffed and you need just left- or right-click em to cure. Tried it yesterday and it works like a charm! =)

KLHThreatMeter is like a damage meter, except it records your threat. By monitoring all the abilities you use and checking your talents, armour set bonuses and buffs, the addon can recreate the threat list of a mob. This makes tank transitions simple, and allows DPS to maximise their damage without pulling aggro.
Note: due to the intricacies of threat, it is only possible to accurately determine your own threat, because you don't know what talents other players are using; also some abilities can only be detected by the player who uses them. Therefore everyone in your party or raid group needs the addon installed to have their threat appear on the table.
In practice only the tanks and DPS need to have the addon, healers might use it to check upcoming tank transitions or warn DPS who are going too high.