WowAce

Shows class colors on player nameplates and names

Target assistance by automatic rewriting of macros

Shows missing buffs and handles welfare and deluxe buffs as one (motw/gotw, blessings, etc.). This lets you see when you nee...

Adds 3 corner indicators to each corner of the Grid frames.

Makes grid QuickHealth aware

Show optimal path for artifact leveling

ag_Pimpster

Adds Raid Target Icon status to Grid (Player or Player Target).

Adds 3 indicators to each side (top, bottom, left and right).

Configure which layout or profile to load on entering a zone

Show a bar indicating the attack power gained from Vengeance.

Displays oRA3 main tanks.

Show an in combat indicator

iTargetingFrames

Shows a countdown bar for the duration of auras (e.g. HoTs, DoTs)

An attempt at giving a complete overview of Arena battles

Make the unit frame fade if out of range.

oUF_HolySmurf

Shows the group leader, raid assistants, and master looter in Grid.

Good looking, smoothy and helpful nameplates