Bars/Lib Data Broker Mods

DataBroker(LDB)

LDB (LibDataBroker) is an interface that allowsplugins to be displayed. Its kind of like FuBar or Titanpanel.
You will need a Display addon to allow the plugins to function.
Popular Display Addons:ChocolateBar, Bazooka
Plugins: WoWInterface, Curse

Glance Information Bar wolfpack4

Glance is a modular information bar with many modules provided by default. Glance has been built from the bottom up to allow developers to create their own data brokers. Each module can be enabled or disabled via the user interface, or the Glance Interface Options panel. So use what you like, turn off what you don't, and let me know what else you'd like to see. I encourage you to read through this somewhat lengthy description, to see just what Glance is capable of..
WoWInterface, Curse

Titan Panel HonorGoG, Lothaer, Tristanian, oXid_FoX

Adds a control panel/info box on top of the screen. Features the ability to have 1 or 2 Bars at the top and/or the bottom of your screen, many built in Addons that give great a great core set of features Easy to use Options to change features on the fly. Added Categories for Mod Authors to make finding there Mod easier inside Titan and help with Menu overload.
WoWInterface, Curse, Titan

Character Information

Altoholic Thaoky, pompachomp

An 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. Shows inventory, level, mail, etc...
WoWInterface, Curse
Review: WoW Insider

Armory Warmexx

All armory information as seen on the offical site from Blizzard Entertainment, in game, for all your characters, on all realms, Information about all skills of your characters including professions with recipes, PVP information including arena teams, Searchable inventory, including bags/bank/mailbox and auctioned items, Quest logs and spell books of all your characters, Searchable achievements and statistics, Share quests, recipes and character information with other Armory users, Searchable Guild Bank that updates itself automatically.
Curse

Loot Information

AtlasLoot Enhanced Hegarol, Celellach, Daviesh, Lag123, arith, Kurax

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.
WoWInterface, Curse
Review: WoW Insider

Tooltip Information

Glyph Reporter earl_parvisjam

Glyph Reporter manages what Glyphs are needed on a realm-by-realm basis.  When a Glyph is hovered over , the tooltip reports any known characters needing that glyph.  It makes inscription disbursement quick and easy.
Curse

idTip Silverwind

Adds SpellIDs and ItemIDs to the various ingame tooltips.
Curse

iTip CHiLLZ

iTip enhances item tooltips with useful information the game fails to display. I wrote iTip because I found other item tooltip addons to be a bit bloated for such a simple task. This addon is extremely lightweight, and self-contained.
WoWInterface

Simple iLevel scotepi

Shows the Average iLevel (AiL) of people you target in the tool tip. There is also a simple caching mechanism in order to not repeatedly inspect people that you already have data for however you can force a inspect of your target by typing /sil target
Curse

Miscellaneous

TinyMainBarInfo Dridzt

Overlays an infopanel to the mainmenu bar micro-buttons area. Mouse over the micro buttons to make them re-appear. Mouse out and they fade showing a panel with data: Session Playtime with player status indicator (away, busy, available); Player Coordinates; Latency; Money; Lowest Durability; Average Item Level color coded by quality; Frames per Second; Memory used by the Lua environment (addons); Total Bandwidth used by the client (up+down).
WoWInterface, Curse

TravelAgent Torhal

Provides a detailed tooltip describing particular localities, such as zones or instances or battlegrounds.
Curse, WoWInterface