PoisonStacks
This addon shows your stacks of deadly poison as combopoints.
It supports the standard ui and some unitframes, but you can also move the points by yourself.
Type /poisonstacks to open the options menu.
Supported unitframes
Other unitframes
I would like to support every unitframe for WoW, but looking into unknown code, testing, etc. isn't that funny.
If you implement a support for other unitframes, contact me and I will add it into the project. You can start at UnitFrames.lua, that file contains a description how to implement another unitframe.
I won't implement support for other unitframes by myself, I'm happy with X-Perl :-)