WowAce

Spell interrupt aid and announcement addon.

Makes those pesky garrison animations go away.

Joins the LFG channel automatically.

Automatically converts a party to a raid when you attempt to zone into a raid zone without a raid.

All Flight Masters, flight duration and more.

Simple raid waiting list

Adds notes to item tooltips

Expiration

Shows loot information in item tooltips

Out of Mana bar.

Adds custom layouts for Grid

Remaining and rested XP Data Broker plugin.

PowerDisplay

Allows you to loot BoP items without prompting when not in a group or raid

Keeps tracks of /rolls.

Adds Blizzard, oRA2, oRA3, CT_RA MainTank or Dungeon Finder Tank icon (shield or MT, 1, 2 ... 10) or text (MT or MT1, MT2 ......

MaxStats

oUF layout looking like ag_Unitframes and Grid.

A customizable buff/debuff display replacement for the default Blizzard frames (with right click cancelaura support).

Control screenshot format and quality via FuBar