WowAce

Adds TargetIcon status to Grid2 (player / player-target).

Adds Buff/Debuff icons to the grid frame.

Makes the message dialog movable

Adds custom layouts for Grid

Display combo points for Arcane Blast debuffs

Adds Debuff Highlighting to oUF.

Adds dungeon role icons to Grid2

Adds AFK status to Grid2.

Show who is targeted by at least one enemy, and the casting progress of the incoming spell.

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

Grid2 LibDataBroker support

Adds AFK status to Grid frames.

oUF_Castbar

FuBar_IceHudFu

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

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

oUF Layout

GridStatusHealPriority

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

Adds combat feedback to oUF.