Boomkinator

Boomkinator is a an addon intended to help learning spell rotations for several dps classes. It check for missing debuffs on the current target and highlights icons of the spells you need to cast, it tracks your own self-buffs and cool-downs and reminds when they are missing.

The Boomkinator frame is shown in combat and displays in the middle of the screen. You can move it by using Shift + MouseDrag after unlocking.

As of v3.2.x the following layout is implemented:
Druid Moonkin – completed
Rogue Outlaw – completed
Warlock Destruction – completed (see notes below)
Warlock Demonology – completed (see notes below)
Walock Affliction – completed