WowAce

Adds Debuff Highlighting to oUF.

Adds AFK status to Grid2.

Grid2 LibDataBroker support

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

Display combo points for Arcane Blast debuffs

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

Adds AFK status to Grid frames.

Custom minimalistic nameplates

oUF_Castbar

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

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

Adds dungeon role icons to Grid2

Adds Statuses for group: leader / assistant / master looter.

oUF Layout

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

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

FuBar_XPerlFu

Adds combat feedback to oUF.

Continuation of Shadowed Unit Frames

Show helper indicators for units conditions (buffs, states, etc).