Omen
Omen is a threat meter.
Basically, enemies in WoW decide who to attack by deciding who is the most threatening based on the abilities you use. What Omen does is provide accurate values of your group's relative threat level on individual enemies, so that you can see when you're in danger of pulling aggro (or, if you're next on the snack list if your tank bites it). This info is usually only critical in raids, where only tanks can survive aggro, but it's useful for any multi-player situation.
Who wrote Omen3?
Xinhuan (Blackrock/Barthilas US Alliance) did.
Do you accept Paypal donations?
Yes, send them to xinhuan@gmail.com
For clarity this is just a fix but it does work in Cata-Classic and should work with MoP-Classic. If you encounter any Lua errors please write them in the comments.