Also, tidy plates with the threat plates skin. Omen is excellent for single target fights, but for multi-target stuff and 5-mans, threat plates is amazing.

I totaly agree about Tidy Plates. While I don't particularly like the "Threat Plates" skin, the addon itself is amazingly helpful when tanking. I prefer the "Gray Plates" tanking skin, as it's cleaner in my opinion and provides the same details as Threat Plates (i.e. tells you when you have full threat and when you're starting to lose threat on any particular mob). You might need to toggle the "tug-of-war" option to show the threat level on each mob, but it works great. In raids, especially when tanking trash, I like to turn on the DPS/Tank symbol on the plates to show whether a mob that you do not have threat on is attacking a DPS or whether it is being tanked by a co-tank.

Don't know about skada, but Omen has implemented the 30 second threat fade from TotT and MD; when someone casts misdirect or tricks, you'll see a countdown from 30 seconds appear next to the tank at the top of Omen. Extremely useful for both tanks and dps classes.

Tidy Plates yes! How can they not mention either Omen or tidy plates in a prot addon article? If someone asked me what addon I wouldn't want to tank without it would be tidy plates.