All armory information as (once) seen on the official site from Blizzard Entertainment, in game, for all your characters, on all realms. Armory

Adds your highest collected level and quality to battle pet tooltips. BetterBattlePetTooltip-5.4.8.62

Character Notes allows you to set and manage notes on other player's characters. Notes are stored per realm so notes are shared across your characters on a realm. Notes can be set on any character name. The notes are simple and generic and are not tied to a friend, an ignored character, etc. CharacterNotes-2.2

Collect Me keeps track of your mounts, companions, titles, toys and followers in the game and can show you what mounts, companions, titles and toys you're missing with additional information on where to get them. It can also summon companions and mounts randomly from a user defined list. CollectMe-v2.4.13

The plugin captures data automatically. After a raid boss encounter, a button with a yellow icon with a shape of a play button appears on the title bar of a Details! window. Click there to have access to the Time Line window. Details-r236

This is a simple and basic addon that shows milling, prospecting and disenchanting sources for your crafting materials! Along with that, it now also shows the locations of all the herbs & ores! This simple tooltip "enchanter" is very straight forward and in easy use! Profession_Assistance-v1.7

is an add on that has been developed to conveniently provide at-a-glance information inside of the character pane. The intended purpose is to make the gearing up process more efficient. Future development will also make this process much easier to maintain across multiple characters. iLvLr-2.1.102

World Boss Status tracks and displays the world bosses defeated by all your characters on the same realm or WOW account. WorldBossStatus-v3.1

Adds IDs to the ingame tooltips. idTip-MoP

Used to quick spawn playbots etc PlayerBots

More to come!