WowAce

Pet Battle Lite Frame

Adds a simple percentage threat status to Grid.

Adds spell-based range checking to Grid, and the ability to check multiple ranges.

Adds AFK status to Grid frames.

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

oUF_HolySmurf

Makes the message dialog movable

Adds Debuff Highlighting to oUF.

Adds AFK status to Grid2.

Adds dungeon role icons to Grid2

Show a bar indicating the unit's Soul Shard count.

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

Adds tooltip for debuffs (and other things? you found out: no).

Adds custom layouts for Grid

Make the unit frame fade if out of range.

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

BlizUF_LMH4

Adds aggro coloring to oUF.

Displays the remaining time on grid icon's cooldown animation.

Show a bar indicating the remaining lifetime of your temporary pet