I think that almost all Tanks aggrees that some over active (especially) wardens are annoying as healer when they make pulling big groups quite difficult by putting zillion of HoT's on you and taking all aggro when you try to gather mobs in one group. This addon removes all HoT's on you during a given time. This Addon works only with /nohots command and it does not have any user interface. /nohots <number> - removes HoT's during <number> seconds. Without <number> argument it just removes HoT's once and removes lingering effect from previous command. Command can be put on ingame macros. I personally use following macro

say HoT's disabled for 10 seconds nohots 10

Currently removes following buffs (in english client)

warden
• Healing Spray
• Healing Current
• Healing Flood
• Soothing Stream
• Downpour
• Healing Showers sentinel
• Lasting Invocation bard
• Motif of Regeneration trinkets
• Hailstone Tideshard
• Frozen Deep One Tear
• Crystal Vine
• Lifeblood Faeshard