Many times Hunters are used to pull for groups. With our FD and cats with prowl it makes us easy to mark/target in crap situations if there are no rogues or druids. This addon makes marking a lot faster. You set up a hotkey, like I use the number 1, while targeting a mob and a circular listing of all the raid marking appear. You dont have to mouse half way across the screen like other addons require. Everything is right where you need them to be so you can switch over to the next target fast and easliy.
Baud Mark can be downloaded from here and there is a pic of what the addon looks like when used. I have used this addon for about 5 months now and have never had a problem with it.