WowAce

Marks ignored players in Grid2 with a color and text notification

Ancestral Fortitude / Inspiration tracker for Grid

Show an "alternate power" bar for boss encounters.

Adds AFK status to Grid2.

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

Adds PvP status to Grid frames.

Adds Yogg-Saron Sanity status to Grid.

Adds Vengance text to Pitbull4 LuaTexts

Adds a bar showing the global cooldown

Flashes Health bar when life drops under a specified percent.

Display an indicator to show your Penetrating Cold target(s).

Hide frames of people you've ignored.

Show a five second rule on the player frame in SUF

Very basic viewport setter

Tracks Prayer of Mending and changes color based on the number stacked

A small datatext for ElvUI-using Shamans that gives them accurate info about their Reincarnation cooldown

Yet another HUD addon

PitBull4_Extras

ShadowedUnitFrames_SmoothBars

PitBull_Prat