WowAce

Customizable text display of character's power.

Auto sizes frame layout depending on group/raid size

Show a relative threat bar.

Hide frames of people you've ignored.

Adds PvP status to Grid frames.

Ancestral Fortitude / Inspiration tracker for Grid

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

oUF_Smurf

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

Tracks Grace and changes color based on the number stacked

oUF_PowerSpark

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

Show an "alternate power" bar for boss encounters.

Changes the nameplates range and disables clamping to screen

PitBull4_Extras

Show a bar indicating the unit's power that can change color based on value.

PitBull_Prat

A lightweight datatext-plugin for Elvui that shows you all the relavant currencies for Draenor.

Adds 4 text indicators to the Grid frames.

GridStatusReadyCheck