WowAce

Adds Debuff Highlighting to oUF.

FuBar_XPerlFu

Very basic viewport setter

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

Show a bar indicating the attack power gained from Vengeance.

Pet Battle Lite Frame

Make the unit frame fade if out of range.

Show a bar indicating the unit's Burning Embers count.

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

An enhancement to the built-in raid frames to change color for debuffs.

Status indicator that shows if a unit is hostile (probably mindcontrolled)

Adds icons to the configuration menu for all standard Grid indicators.

Adds a simple percentage threat status to Grid.

Adds "line of sight" status to Grid (after the error occurs).

GridAlert

A datatext for currencies that is highly costumizable, Includes a tooltip for hidden currencies

Hide frames of people you've ignored.

Grid2 LibDataBroker support

FuBar_IceHudFu

Adds PvP status to Grid frames.