eCooldownPulse is an addon that tells you expired cooldown by icon.

if you are updating from ver. 0.1.1, existing settings will be reset.
implemented queueing system for multiple CD expirations.
(if several CD expirations occured at once, all of them will be shown.)
added GUI configration.
removed on/off, lock, size and key command.
added playing sound function(default is off).

when some skill's cooldown has finished, this addon tells you that by animated corresponding icon.
(cooldowns that are shorter than five seconds will be ignored)
this addon works with item cooldowns as well.
you can configure position, size and more.

after installation of this addon, GUI configuration window will popup on your screen(see screenshots).
set your configuration and close(see below), then this addon starts working.

only skills(and items) registered on your action bars are intended.
skills(or items) registered on your pet-action bars and extra-action bars are NOT intended at this version.
technically, timing of expired cooldown is not correct. the icon starts animation 0.5sec early.
if there are shared CD(potions for instance), this addon uses the icon of lowest action slot#.
CDs have been reset by Serenity(scout skill) will be not shown.
(icon of Serenity itself will be shown though)