This addon is now ready for 3.3 with the updated LibHealComm-4.0 library embedded. Please note as I am currently rebuilding my UI and still use oUF 1.3.28 due to that being the version my personal layout was built in, this addon has not been tested with newer versions of oUF. I'll likely be updating this in the near future.
Simple module for oUF that adds a visual representation of incoming direct heals to your oUF healthbars. A semi-transparent green bar will be added to the end of healthbars showing how total value of direct heals (including your own) currently being cast on the target. If the incoming heals would overheal, this bar will extend beyond the end of the regular healthbar.
By default a healing estimate bar is added to all your oUF unit frames. In your oUF layout you can set self.ignoreHealComm to non-nil for any frames you want to have excluded. Colour and alpha for the healing bar can be adjusted near the top of oUF_HealComm.lua.
The LibHealComm-4.0 library is used for healing data communication. It is embedded within this addon as well as various popular unit frame mods (grid, pitbull, xperl, etc) so chances are good most of your raiders have it already and information about their heals will be available to be displayed. You can encourage any healers in your raid who aren't already using any such mods already to at least install the standalone library so their heals can still be displayed.
1.2.1 - Removed leftover debug messages, oops!
1.2 - Embedded LibHealComm-4.0 and updated for WoW 3.3
1.1 - Embedded LibHealComm 3.0 r16; now compatible with WoW 3.0