WowAce

Configure which layout or profile to load on entering a zone

Adds a simple percentage threat status to Grid.

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

Provides the the health and target of by an unit targeted mob (meant to be used for tanks).

Show a bar indicating the unit's Holy Power count.

Draws 3D portraits for main units that can be moved or resized at will.

Surfaces

ag_Pimpster

Makes the message dialog movable

oUF layout looking like ag_Unitframes and Grid.

An attempt at giving a complete overview of Arena battles

Adds Buff/Debuff icons to the grid frame.

Adds aggro coloring to oUF.

Adds Debuff Highlighting to oUF.

FuBar_XPerlFu

Show a bar indicating the attack power gained from Vengeance.

Adds custom layouts for Grid

Adds AFK status to Grid frames.

oUF Layout

Show optimal path for artifact leveling