Buff Mods

Aura Frames Tartarusnl, ripsome1

Aura Frames allows you to display any kind of buff or debuff on any given unit with highly customizable filtering and ordering functionality. It also includes information about internal cooldowns, spell cooldowns, totems and weapon enchantments. Supports two ways of displaying aura's: Button style or bar style. Features: Buffs and Debuffs on any unit (your self, target, pet etc); Weapon enchantments; Spell cooldowns; Spell cooldowns for your pet; Mouse over; Test unit; Totems.
Curse

BasicBuffs Funkydude

Allows you to move the default Blizzard buff frame.
Commands: /bb or /basicbuffs
Curse

CT BuffMod

Allows a much different style of customizable buff display. Buff names and durations can be shown. Buffs can be sorted by type or duration. BuffMod is very versatile and the only way to truly find the settings you like is to play with the options. By unlocking the buff frame via the control panel, you can move the buffs to your selected location. Click and drag anywhere on the window to move it, or use the lower right corner to resize it.
CTMod

nBuff Neal

Simple buff mod from NeavUI. Restyles buffs & debuffs.
Requires !Beautycase for borders.
Config: Lua
Vranx Note: The screenshot shows a modified border image, the normal Beautycase border is lighter.
WoWInterface

PhanxBuffs Akkorian, Phanx

PhanxBuffs is a basic replacement for the default UI's buff, debuff, and temporary enchant (weapon buff) frames. It looks and acts basically like the default buff frames, with a few improvements: Buff and debuff icons are sorted by their remaining duration, Text timers are shown only when less than 30 seconds remain on the buff or debuff, Weapon buff icons can show the spell or item that buffed your weapon, instead of the weapon itself, Buff tooltips show the name of the party or raid member who cast the buff on you, Buffs or debuffs you never want to see can be hidden (eg. Chill of the Throne), Basic configuration options are available.
WoWInterface, Curse

rBuffFrameStyler zork

Allows you to configure, move, scale and style (textures, shadows) the default player auras! Is rightclicking buffs/tempenchat possible? Yes it is.
WoWInterface

Timers

ButtonTimers Misen

ButtonTimers is action buttons with timers attached. The timers can be configured to show a buff/debuff or the cooldown of a spell. The timers are highly configurable, with lots of options to play with.
Config: /buttontimers config
Curse

ClassTimer Stanzilla, ominous

Creates timer bars or icons for buffs and debuffs for player, target and focus. All three bars can be moved seperately. To track CC Effects you must set the CCed mob as your focus if its not your target.
Config: /classtimer
Curse

Buff/DeBuff/Proc Trackers

AdiButtonAuras Adirelle

Displays aura information directly inside action buttons. AdiButtonAuras is a rewrite of Inline Auras.
Curse

Cork Tekkub

Cork is a reminder addon, aimed primarily at buffs.
Reminders for: self-only buffs, auras and shapeshifts; raid-group buffs cast on multiple targets; warrior shouts while in combat; missing Talent Points; missing Glyphs; available Trainer Spells; missing Food Buffs; unselected Minimap Tracking; Repairing while in town; opening Clams; Combinable items. Class Reminders for: Priest Fear Ward, Shaman Earth Shield, Warlock Demons/Soul Link/Missing Soulstones & Healthstones. Includes a Macro-generating button like Buffet's.
github, WoWInterface, Curse

CT PartyBuffs

Allows displaying of buffs on the default party frames.
CTMod

Decursive Archarodim

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

DebuffFilter porkbone, aborgolotto

This addon is to filter out the debuffs and buffs you don't care about. If you melee, you can filter out everything but CoR, FF, and Sunder. If you're a caster, you can just show debuffs like CoE and Winter's Chill. Healers can filter out everything but their buffs and HoTs, etc.
Curse

GoodNewsEveryone Tekkub

GoodNewsEveryone! is a "reactive ability" alert addon. It will display proc buffs the player should know about for decision making, and abilities that are only available under certain conditions. GNE! is inspired by OhSnap's design and MSBT's triggers.
GitHub, Curse

NeedToKnow Kitjan, lieandswell

Allows you to monitor specific buffs and debuffs of your choosing as timer bars that always appear in a consistent place on your screen in a consistent color. It's especially useful for monitoring frequently used short-duration buffs and debuffs. For example, a rogue could configure NeedToKnow to show timer bars for Slice and Dice, Rupture, and their own stack of Deadly Poison VII. NeedToKnow also works with procs and on-use trinkets. The number, size, position, and color of timer bars are all customizable.
WoWInterface, Curse
Review: WoW Insider

NugRunning d87

Tracker for DoTs, HoTs, Cooldowns and other auras for all classes.
Config desired spells with trackings.lua
Config: Lua
WoWInterface, Curse

Power Auras Classic Resike

Gives players better visibility when you gain buffs, debuffs, etc.... You can see the graphic I set up in the screenshot, it will show when I dont have Battle Shout active and it will only show when I am in combat.
Config: /powa
Curse
Info: Wiki
Tutorials:Tankspot, WoW Insider
Textures: Holy Power Textures, Textures/Sounds @ Curse
Review: WoW Insider

Proculas Xocide

Proculas is an addon that will tell you when things proc and gather statistics about procs such as Total Times Procced, Procs Per Minute, Proc Uptime and estimate the cooldown.
Curse

Raven Tojaso, Tomber

Customizable timer bar and icon configurations to monitor buffs, debuffs and cooldowns. Comprehensive condition checking to support buffing/debuffing, spell rotations, etc. Highlights for active spells plus cooldown counters on Bartender4, Dominos and Macaroon buttons. Preset spell colors and cooldowns plus buff-related conditions for each class.
WoWInterface, Curse
Review: WoW Insider

rFilter3 zork

Lets you track/filter buffs, debuffs and cooldowns. This mod requires Lua code editing to set up the spells to track and their location on the screen.
Config: Lua
WoWInterface

SmartAuraWatch Aeldra

Notifies you with an icon, time left, charges and target of the aura that has procced. It is possible to monitor several auras on different targets at the same bar. It provides also a handy default set of proccs for each class.
WoWInterface, Curse

SmartBuff Aeldra

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. Run the mod when ever you wish, if nothing is buffed, there is no penalty or cool down.
WoWInterface, Curse
Review: WoW Insider

Spell Overlay Timers DarkStarX

Adds timers to the default Blizzard Spell Overlays.
Curse

TellMeWhen orbenn, Cybeloras, lieandswell, Ooze

Provides a flexible system of icons for displaying vital information about cooldowns, buffs, debuffs, and reactive abilities... always in a consistent place on your screen. You choose which spells, abilities, items, buffs, and debuffs TellMeWhen shows. The number, size, and position of icons are all customizable. Cooldown icons can be shown when an ability/item is either usable or is unusable. Buff/debuff icons can be shown when the buff/debuff is either present or is absent. Icons can be set to only show in combat.
Curse, WoWInterface
Video: YouTube
Review: WoW Insider

WeakAuras Mirrormn

WeakAuras is a powerful and flexible framework that allows you to display highly customizable graphics on your screen to indicate buffs, debuffs, and a whole host of similar types of information. It was originally meant to be a lightweight replacement for Power Auras, but it now incorporates many features that Power Auras does not, while still remaining more efficient and easy to use.
Curse
Tutorials; WoW Insider, Usage, Examples, Forum, YouTube, Vox Immortalis
Review: WoW Insider
Import Strings: Vox Immortalis