unitDoodles
unitDoodles provides a framework for adding aura/state tracking textures to unit frames. Currently, timer bars and indicator dots have been implemented. The addon is independent of the unit frames themselves and offers support for the default UI, oUF based layouts, X-Perl, Pitbull4, and Grid. The 'doodling' system is very flexible and highly configurable.
Here's an example of time bars attached to a target frame that are tracking warlock DoTs:

Similarly, here are some example timer bars tracking HoTs on a friendly target. On this image you will also see indicator DoTs in the middle of the unit frame tracking buffs (innervate, and thorns):

To configure the addon, please see the unitDoodles section of the Addons tab on the in-game interface options panel.
Development
The addon is currently still under development. For alpha releases please see the CurseForge project page: http://wow.curseforge.com/addons/unitdoodles/files/
Current levels of UnitFrame support:
- oUF - well tested. Default doodles work nicely with the oUF_Nivaya layout (which rocks!)
- default UI - fully functional and moderately well tested
- X-Perl - implemented, but relatively untested
- Pitbull4 - implemented, but relatively untested
- Grid - implemented, but relatively untested
Ready-made doodle sets for different classes:
- Warlocks - good support for affliction and demonology
- Druids - good support for balance and restoration
These are the classes and spec's that I play. If you are interested in using unitDoodles and play other classes/spec's I would love to include your doodle sets in future releases of the addon! You can get a text representation of your doodle sets in-game through the configuration options panel. Please submit them to me by opening a ticket here: http://wow.curseforge.com/addons/unitdoodles/tickets/, or by email at sonora.kirintor@gmail.com.
If you are interested in helping to develop the addon, add additional unit frame support, or add a new localization please contact me here via PM or at sonora.kirintor@gmail.com.