This module flashes suggested spells for all three Hunter specs. You can find *lots* more information on its website.
Bitten's SpellFlash modules replace Blizzard's default proc highlighting to flash the button you should press next to achieve maximum dps on a boss fight. Or if you are a tank, to maximize your survivability. For healers, they are just slightly smarter proc highlighters. Dps modules follow or are similar to priority schemes found in SimulationCraft and/or Icy Veins. Sometimes you have to be smarter than SpellFlash, e.g. when saving a cooldown for a specific boss mechanic, but in general following the recommendations will improve most people's performance.
All the rotations implement automatic AoE switching
though the detection can sometimes be a touch off.