Paladin- Flash of Light, WoG, Sacred Shield, Eternal Flame, Seal of Insight, T90 talent.
Druid- Frenzied Regeneration, Mastery Shield, Tooth and Claw, Lvl 90 talent healing. May also affect lvl 30 talent healing, and Leader of the Pack.
DK- Blood Shield, Rune Shield, Lvl 75 talent healing, DS healing.
Warrior- Shield Barrier, MS healing, LvL 30 talent healing.
Monk- Guard, Expel Harm, GotO orbs, Surging Mists, T30 talent healing.
Paladins/Druids get significant benefit from it.
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Also, for tank DAMAGE, the number blizz is throwing around is 75% of a dps's dps.