[url=http://www.cosmosui.org/showthread.php?t=57523]Cosmos[/url] has dropped DamageMeters due to lack of a maintainer.  Cosmos user Astaldo presented some addons to take its place.

[url=http://wow.curse.com/downloads/details/10598/#files]Recount (preservation)[/url]
This is a branch off Recount updated by Elsia for patch 2.4.  Astaldo mentioned that the original author of this addon, Cryect, is working on writing Recount2 from the ground up.  But I was unable to locate anything further with regard to this project.  Of the three addons Astaldo suggested, this is my current choice.

[url=http://wow.curse.com/downloads/details/11678/]YACL[/url]
I tried this one out and it looks nice, though the window is quite large and I didn't see a way to resize it.  Additonally, the addon is designed so that the window disappears so as to be out of your way during combat and I just had too many problems with it disappearing when I didn't want it to.

[url=http://wow.curse.com/downloads/details/5467/]Recap (Hawsky)[/url]
The version I tried would freeze my WoW when I tried to issue the /recap command.  So, I have no idea how well this one might work.