Not sure you need that in Rift? Since you can use Raid UI for both groups and raids (it's an in-game UI setting). Rift's Raid UI is synchronized and identical for all members of the group/raid so it's easy to click-heal.

But you don't actually have to click anything at all. Just hover your mouse over the appropriate group/raid member and hit a button to have your healers heal that member. Use the @mouseoverui modifier in the macro, such as "cast @mouseoverui Healing Breath". Great for cleansing, buffing, healing.